feat: merge refactor/optimize-parameter-measurement-value-api into develop

2026-07-24 11:03:32 +08:00 · 2026-07-24 11:03:32 +08:00 · b7d8af3594
parent 72e2143cb3 0adfe022b2
commit b7d8af3594
66 changed files with 4011 additions and 402 deletions
--- a/common/data_object_errors.go
+++ b/common/data_object_errors.go
@ -0,0 +1,23 @@
+// Package common define common error variables
+package common
+
+import "errors"
+
+var (
+	// ErrUnsupportedParameterField indicates that a requested parameter field is not supported.
+	ErrUnsupportedParameterField = errors.New("unsupported parameter field")
+	// ErrInvalidParameterToken indicates that a token cannot represent a parameter.
+	ErrInvalidParameterToken = errors.New("invalid parameter token")
+	// ErrParameterTokenNotFound indicates that no parameter matches the token hierarchy.
+	ErrParameterTokenNotFound = errors.New("parameter token not found")
+	// ErrAmbiguousParameterToken indicates that a token matches more than one parameter.
+	ErrAmbiguousParameterToken = errors.New("ambiguous parameter token")
+	// ErrUnsupportedMeasurementField define error of unsupport measurement field
+	ErrUnsupportedMeasurementField = errors.New("unsupported measurement field")
+	// ErrInvalidMeasurementToken indicates that a token cannot represent a measurement.
+	ErrInvalidMeasurementToken = errors.New("invalid measurement token")
+	// ErrMeasurementTokenNotFound indicates that no measurement matches the token hierarchy.
+	ErrMeasurementTokenNotFound = errors.New("measurement token not found")
+	// ErrAmbiguousMeasurementToken indicates that a token matches more than one measurement.
+	ErrAmbiguousMeasurementToken = errors.New("ambiguous measurement token")
+)
--- a/common/errcode/bussiness_error.go
+++ b/common/errcode/bussiness_error.go
@ -38,6 +38,9 @@ var (
 	// ErrCommitTxFailed indicates that the PostgreSQL transaction could not be committed successfully.
 	ErrCommitTxFailed = newError(50005, "postgres database transaction commit failed")

+	// ErrMeasurementValueUpdateFailed indicates that a manual measurement value transaction failed.
+	ErrMeasurementValueUpdateFailed = newError(50006, "measurement manual value update failed")
+
 	// ErrCachedQueryFailed define variable to indicates an error occurred while attempting to fetch data from the Redis cache.
 	ErrCachedQueryFailed = newError(60001, "query redis cached data failed")

--- a/common/errcode/error.go
+++ b/common/errcode/error.go
@ -66,8 +66,8 @@ func Wrap(msg string, err error) *AppError {
 	return appErr
 }

-// UnWrap define func return the error wrapped in structure
-func (e *AppError) UnWrap() error {
+// Unwrap returns the underlying cause for errors.Is and errors.As traversal.
+func (e *AppError) Unwrap() error {
 	return e.cause
 }

--- a/constants/context.go
+++ b/constants/context.go
@ -1,7 +1,13 @@
 // Package constants define constant variable
 package constants

+// ClientTokenContextName is the Gin key used for the configured client token.
+const ClientTokenContextName = "client_token"
+
 type contextKey string

 // MeasurementUUIDKey define measurement uuid key into context
 const MeasurementUUIDKey contextKey = "measurement_uuid"
+
+// CtxKeyClientToken is the typed standard-library context key for client token propagation.
+const CtxKeyClientToken contextKey = ClientTokenContextName
--- a/constants/data-object.go
+++ b/constants/data-object.go
@ -0,0 +1,19 @@
+// Package constants define constant variable
+package constants
+
+// DataObjectType identifies the kind of object represented by a data object token.
+type DataObjectType string
+
+const (
+	// DataObjectTypeParameter represents a component parameter.
+	DataObjectTypeParameter DataObjectType = "parameter"
+	// DataObjectTypeMeasurement represents a component measurement.
+	DataObjectTypeMeasurement DataObjectType = "measurement"
+)
+
+const (
+	// MeasurementModeManual indicates that manual value entry is enabled.
+	MeasurementModeManual int16 = 0
+	// MeasurementModeAutomatic indicates that the measurement runs automatically.
+	MeasurementModeAutomatic int16 = 1
+)
--- a/constants/parameter_table.go
+++ b/constants/parameter_table.go
@ -0,0 +1,26 @@
+// Package constants define constant variable
+package constants
+
+import "strings"
+
+var supportedParameterTableSuffixes = [...]string{
+	"base_extend",
+	"rated",
+	"setup",
+	"model",
+	"stable",
+	"craft",
+	"integrity",
+	"behavior",
+}
+
+// IsSupportedParameterTableName reports whether a dynamic parameter table has
+// one of the supported attribute-group suffixes.
+func IsSupportedParameterTableName(tableName string) bool {
+	for _, suffix := range supportedParameterTableSuffixes {
+		if strings.HasSuffix(tableName, "_"+suffix) {
+			return true
+		}
+	}
+	return false
+}
--- a/constants/parameter_table_test.go
+++ b/constants/parameter_table_test.go
@ -0,0 +1,25 @@
+package constants
+
+import "testing"
+
+func TestIsSupportedParameterTableName(t *testing.T) {
+	tests := []struct {
+		name      string
+		tableName string
+		want      bool
+	}{
+		{name: "bay table is excluded", tableName: "ct_ct_demo_bay", want: false},
+		{name: "model table is included", tableName: "cable_cable_demo_model", want: true},
+		{name: "base extend table is included", tableName: "cable_cable_demo_base_extend", want: true},
+		{name: "suffix must start at separator", tableName: "cable_cable_demomodel", want: false},
+		{name: "empty table name", tableName: "", want: false},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			if got := IsSupportedParameterTableName(tt.tableName); got != tt.want {
+				t.Fatalf("IsSupportedParameterTableName(%q) = %v, want %v", tt.tableName, got, tt.want)
+			}
+		})
+	}
+}
--- a/database/query_bay_columns.go
+++ b/database/query_bay_columns.go
@ -0,0 +1,28 @@
+package database
+
+import (
+	"context"
+	"strings"
+
+	"modelRT/orm"
+
+	"gorm.io/gorm"
+)
+
+// QueryBayDevColumnNames returns the bay table columns exposed as token7
+// candidates under token6=bay.
+func QueryBayDevColumnNames(ctx context.Context, db *gorm.DB) ([]string, error) {
+	columnTypes, err := db.WithContext(ctx).Migrator().ColumnTypes((&orm.Bay{}).TableName())
+	if err != nil {
+		return nil, err
+	}
+
+	columnNames := make([]string, 0, len(columnTypes))
+	for _, columnType := range columnTypes {
+		columnName := columnType.Name()
+		if strings.HasPrefix(columnName, "dev_") {
+			columnNames = append(columnNames, columnName)
+		}
+	}
+	return columnNames, nil
+}
--- a/database/query_component_measurement.go
+++ b/database/query_component_measurement.go
@ -3,24 +3,270 @@ package database

 import (
 	"context"
+	"encoding/json"
 	"fmt"
+	"strings"
+	"time"

+	"modelRT/common"
+	"modelRT/constants"
 	"modelRT/orm"
+	"modelRT/sql"

 	"golang.org/x/sync/errgroup"
 	"gorm.io/gorm"
+	"gorm.io/gorm/clause"
 )

-type ZoneWithParent struct {
-	orm.Zone
-	GridTag string `gorm:"column:grid_tag"`
+const (
+	measurementOperationsLimit    = 500
+	measurementOperationAppendSQL = "(array_append(operations, ?::jsonb))[GREATEST(cardinality(operations) - ? + 2, 1):]"
+)
+
+// QueryMeasurementByID returns a measurement by primary key without acquiring
+// a row lock. Call QueryMeasurementByIDForUpdate for write workflows.
+func QueryMeasurementByID(ctx context.Context, db *gorm.DB, id int64) (orm.Measurement, error) {
+	var measurement orm.Measurement
+	cancelCtx, cancel := context.WithTimeout(ctx, 5*time.Second)
+	defer cancel()
+	result := db.WithContext(cancelCtx).
+		Where(sql.MeasurementIDWhere, id).
+		Take(&measurement)
+
+	if result.Error != nil {
+		return orm.Measurement{}, fmt.Errorf("query measurement %d: %w", id, result.Error)
+	}
+	return measurement, nil
 }

-type StationWithParent struct {
-	orm.Zone
-	ZoneTag string `gorm:"column:zone_tag"`
+// QueryMeasurementByIDForUpdate locks a measurement row and loads only the
+// fields required by the data-object update workflow.
+func QueryMeasurementByIDForUpdate(ctx context.Context, tx *gorm.DB, id int64) (orm.Measurement, error) {
+	var measurement orm.Measurement
+	result := tx.WithContext(ctx).
+		Select("id", "mode", "data_source").
+		Where(sql.MeasurementIDWhere, id).
+		Clauses(clause.Locking{Strength: "UPDATE"}).
+		Take(&measurement)
+	if result.Error != nil {
+		return orm.Measurement{}, fmt.Errorf("lock measurement %d: %w", id, result.Error)
+	}
+	return measurement, nil
 }

+// QueryMeasurementByToken define function query circuit diagram component measurement info by token from postgresDB
+func QueryMeasurementByToken(ctx context.Context, tx *gorm.DB, token string) (orm.Measurement, error) {
+	measurement, _, err := QueryMeasurementByDataObjectToken(ctx, tx, token)
+	if err != nil {
+		return orm.Measurement{}, err
+	}
+	return *measurement, nil
+}
+
+// UpdateMeasurementMode stores the data-object mode representation in the
+// measurement row: false is manual mode (0), true is automatic mode (1).
+func UpdateMeasurementMode(ctx context.Context, db *gorm.DB, measurementID int64, automatic bool) error {
+	mode := constants.MeasurementModeManual
+	if automatic {
+		mode = constants.MeasurementModeAutomatic
+	}
+
+	result := db.WithContext(ctx).
+		Model(&orm.Measurement{}).
+		Where("id = ?", measurementID).
+		Update("mode", mode)
+	if result.Error != nil {
+		return fmt.Errorf("update measurement %d mode: %w", measurementID, result.Error)
+	}
+	if result.RowsAffected == 0 {
+		return fmt.Errorf("update measurement %d mode affected no rows", measurementID)
+	}
+	return nil
+}
+
+// UpdateMeasurementModeWithOperation changes mode and appends its audit entry
+// atomically. The operations array retains only its newest 500 entries.
+func UpdateMeasurementModeWithOperation(ctx context.Context, db *gorm.DB, measurementID int64, mode int16, timestamp time.Time) error {
+	if mode != constants.MeasurementModeManual && mode != constants.MeasurementModeAutomatic {
+		return fmt.Errorf("measurement mode must be 0 or 1, got %d", mode)
+	}
+	operation := orm.JSONMap{
+		"command":   mode,
+		"timestamp": timestamp.UnixMilli(),
+	}
+	return updateMeasurementWithOperation(ctx, db, measurementID, map[string]any{"mode": mode}, operation)
+}
+
+// AppendMeasurementValueOperation appends the audit result of a manual-value
+// transaction without changing other measurement columns.
+func AppendMeasurementValueOperation(ctx context.Context, db *gorm.DB, measurementID int64, transaction int, value float64, timestamp time.Time) error {
+	operation := orm.JSONMap{
+		"transaction": transaction,
+		"value":       value,
+		"timestamp":   timestamp.UnixMilli(),
+	}
+	return updateMeasurementWithOperation(ctx, db, measurementID, nil, operation)
+}
+
+func updateMeasurementWithOperation(ctx context.Context, db *gorm.DB, measurementID int64, updates map[string]any, operation orm.JSONMap) error {
+	encodedOperation, err := json.Marshal(operation)
+	if err != nil {
+		return fmt.Errorf("encode measurement %d operation: %w", measurementID, err)
+	}
+
+	operationExpression := gorm.Expr(
+		measurementOperationAppendSQL,
+		string(encodedOperation),
+		measurementOperationsLimit,
+	)
+	if updates == nil {
+		updates = make(map[string]any, 1)
+	}
+	updates["operations"] = operationExpression
+
+	result := db.WithContext(ctx).
+		Model(&orm.Measurement{}).
+		Where("id = ?", measurementID).
+		Updates(updates)
+	if result.Error != nil {
+		return fmt.Errorf("update measurement %d operation: %w", measurementID, result.Error)
+	}
+	if result.RowsAffected == 0 {
+		return fmt.Errorf("update measurement %d operation affected no rows", measurementID)
+	}
+	return nil
+}
+
+// ValidateMeasurementToken checks whether token uniquely identifies an existing
+// measurement through the measurement, component, bay, station, zone, and grid
+// relationships. Supported formats are token1-token7, token4-token7, and
+// token4.token7.
+func ValidateMeasurementToken(ctx context.Context, db *gorm.DB, token string) error {
+	query, args, err := buildMeasurementTokenValidationQuery(token)
+	if err != nil {
+		return err
+	}
+
+	var count int64
+	if err := db.WithContext(ctx).Raw(query, args...).Scan(&count).Error; err != nil {
+		return fmt.Errorf("query measurement token %q: %w", token, err)
+	}
+
+	switch {
+	case count == 0:
+		return fmt.Errorf("%w: %q", common.ErrMeasurementTokenNotFound, token)
+	case count > 1:
+		return fmt.Errorf("%w: %q matched %d records", common.ErrAmbiguousMeasurementToken, token, count)
+	default:
+		return nil
+	}
+}
+
+// QueryMeasurementByDataObjectToken validates token and returns the existing
+// measurement and its owning component for attribute response construction.
+func QueryMeasurementByDataObjectToken(ctx context.Context, db *gorm.DB, token string) (*orm.Measurement, *orm.Component, error) {
+	validationQuery, args, err := buildMeasurementTokenValidationQuery(token)
+	if err != nil {
+		return nil, nil, err
+	}
+
+	query := buildMeasurementRowsQuery(validationQuery)
+	var rows []orm.Measurement
+	if err := db.WithContext(ctx).Raw(query, args...).Scan(&rows).Error; err != nil {
+		return nil, nil, fmt.Errorf("query measurement token %q: %w", token, err)
+	}
+
+	switch len(rows) {
+	case 0:
+		return nil, nil, fmt.Errorf("%w: %q", common.ErrMeasurementTokenNotFound, token)
+	case 1:
+		// Continue by loading the owning component.
+	default:
+		return nil, nil, fmt.Errorf("%w: %q matched more than one record", common.ErrAmbiguousMeasurementToken, token)
+	}
+
+	var component orm.Component
+	result := db.WithContext(ctx).
+		Raw(compactMeasurementSQL(sql.MeasurementComponentByUUID), rows[0].ComponentUUID).
+		Scan(&component)
+	if result.Error != nil {
+		return nil, nil, fmt.Errorf("query component for measurement token %q: %w", token, result.Error)
+	}
+	if result.RowsAffected == 0 {
+		return nil, nil, fmt.Errorf("%w: component for %q", common.ErrMeasurementTokenNotFound, token)
+	}
+
+	return &rows[0], &component, nil
+}
+
+func buildMeasurementRowsQuery(validationQuery string) string {
+	measurementQuery := strings.Replace(
+		validationQuery,
+		sql.MeasurementCountSelect,
+		sql.MeasurementRowsSelect,
+		1,
+	)
+	return compactMeasurementSQL(strings.Join([]string{measurementQuery, sql.MeasurementLimitTwo}, "\n"))
+}
+
+func compactMeasurementSQL(statement string) string {
+	return strings.Join(strings.Fields(statement), " ")
+}
+
+func buildMeasurementTokenValidationQuery(token string) (string, []any, error) {
+	parts := strings.Split(token, ".")
+	for _, part := range parts {
+		if part == "" {
+			return "", nil, fmt.Errorf("%w %q: token segment cannot be empty", common.ErrInvalidMeasurementToken, token)
+		}
+	}
+
+	switch len(parts) {
+	case 7:
+		if parts[5] != "bay" {
+			return "", nil, fmt.Errorf("%w %q: token6 must be bay", common.ErrInvalidMeasurementToken, token)
+		}
+		query := compactMeasurementSQL(strings.Join([]string{
+			sql.MeasurementTokenValidationQueryBase,
+			sql.MeasurementSevenPartTokenWhere,
+		}, "\n"))
+		return query, []any{parts[0], parts[1], parts[2], parts[3], parts[4], parts[6]}, nil
+	case 4:
+		if parts[2] != "bay" {
+			return "", nil, fmt.Errorf("%w %q: token6 must be bay", common.ErrInvalidMeasurementToken, token)
+		}
+		query := compactMeasurementSQL(strings.Join([]string{
+			sql.MeasurementTokenValidationQueryBase,
+			sql.MeasurementFourPartTokenWhere,
+		}, "\n"))
+		return query, []any{parts[0], parts[1], parts[3]}, nil
+	case 2:
+		query := compactMeasurementSQL(strings.Join([]string{
+			sql.MeasurementTokenValidationQueryBase,
+			sql.MeasurementTwoPartTokenWhere,
+		}, "\n"))
+		return query, []any{parts[0], parts[1]}, nil
+	default:
+		return "", nil, fmt.Errorf("%w %q: expected 2, 4, or 7 segments, got %d", common.ErrInvalidMeasurementToken, token, len(parts))
+	}
+}
+
+// GetAllMeasurements define func to query all measurement info from postgresDB
+func GetAllMeasurements(ctx context.Context, tx *gorm.DB) ([]orm.Measurement, error) {
+	var measurements []orm.Measurement
+
+	// ctx超时判断
+	cancelCtx, cancel := context.WithTimeout(ctx, 5*time.Second)
+	defer cancel()
+	result := tx.WithContext(cancelCtx).Clauses(clause.Locking{Strength: "UPDATE"}).Find(&measurements)
+	if result.Error != nil {
+		return nil, result.Error
+	}
+	return measurements, nil
+}
+
+// GetFullMeasurementSet queries all hierarchy tags required to build
+// measurement recommendations.
 func GetFullMeasurementSet(ctx context.Context, db *gorm.DB) (*orm.MeasurementSet, error) {
 	mSet := &orm.MeasurementSet{
 		GridToZoneTags:       make(map[string][]string),
@ -33,10 +279,35 @@ func GetFullMeasurementSet(ctx context.Context, db *gorm.DB) (*orm.MeasurementSe

 	g, gctx := errgroup.WithContext(ctx)
 	db = db.WithContext(gctx)
+	var bayLinkedCompTags []string
+	var bayDevColumnNames []string
+
+	g.Go(func() error {
+		var linkedComponents []struct {
+			CompTag string `gorm:"column:comp_tag"`
+		}
+		if err := db.Raw(compactMeasurementSQL(sql.MeasurementBayLinkedComponentTags)).Scan(&linkedComponents).Error; err != nil {
+			return fmt.Errorf("query bay-linked components: %w", err)
+		}
+		bayLinkedCompTags = make([]string, 0, len(linkedComponents))
+		for _, component := range linkedComponents {
+			bayLinkedCompTags = append(bayLinkedCompTags, component.CompTag)
+		}
+		return nil
+	})
+
+	g.Go(func() error {
+		var err error
+		bayDevColumnNames, err = QueryBayDevColumnNames(gctx, db)
+		if err != nil {
+			return fmt.Errorf("query bay dev columns: %w", err)
+		}
+		return nil
+	})

 	g.Go(func() error {
 		var grids []orm.Grid
-		if err := db.Table("grid").Select("tagname").Scan(&grids).Error; err != nil {
+		if err := db.Raw(compactMeasurementSQL(sql.MeasurementGridTags)).Scan(&grids).Error; err != nil {
 			return fmt.Errorf("query grids: %w", err)
 		}
 		for _, grid := range grids {
@ -52,16 +323,13 @@ func GetFullMeasurementSet(ctx context.Context, db *gorm.DB) (*orm.MeasurementSe
 			orm.Zone
 			GridTag string `gorm:"column:grid_tag"`
 		}
-		if err := db.Table("zone").
-			Select("zone.*, grid.tagname as grid_tag").
-			Joins("left join grid on zone.grid_id = grid.id").
-			Scan(&zones).Error; err != nil {
+		if err := db.Raw(compactMeasurementSQL(sql.MeasurementZoneHierarchy)).Scan(&zones).Error; err != nil {
 			return fmt.Errorf("query zones: %w", err)
 		}
-		for _, z := range zones {
-			mSet.AllZoneTags = append(mSet.AllZoneTags, z.TAGNAME)
-			if z.GridTag != "" {
-				mSet.GridToZoneTags[z.GridTag] = append(mSet.GridToZoneTags[z.GridTag], z.TAGNAME)
+		for _, zone := range zones {
+			mSet.AllZoneTags = append(mSet.AllZoneTags, zone.TAGNAME)
+			if zone.GridTag != "" {
+				mSet.GridToZoneTags[zone.GridTag] = append(mSet.GridToZoneTags[zone.GridTag], zone.TAGNAME)
 			}
 		}
 		return nil
@ -72,40 +340,40 @@ func GetFullMeasurementSet(ctx context.Context, db *gorm.DB) (*orm.MeasurementSe
 			orm.Station
 			ZoneTag string `gorm:"column:zone_tag"`
 		}
-		if err := db.Table("station").
-			Select("station.*, zone.tagname as zone_tag").
-			Joins("left join zone on station.zone_id = zone.id").
-			Scan(&stations).Error; err != nil {
+		if err := db.Raw(compactMeasurementSQL(sql.MeasurementStationHierarchy)).Scan(&stations).Error; err != nil {
 			return fmt.Errorf("query stations: %w", err)
 		}
-		for _, s := range stations {
-			mSet.AllStationTags = append(mSet.AllStationTags, s.TAGNAME)
-			if s.ZoneTag != "" {
-				mSet.ZoneToStationTags[s.ZoneTag] = append(mSet.ZoneToStationTags[s.ZoneTag], s.TAGNAME)
+		for _, station := range stations {
+			mSet.AllStationTags = append(mSet.AllStationTags, station.TAGNAME)
+			if station.ZoneTag != "" {
+				mSet.ZoneToStationTags[station.ZoneTag] = append(mSet.ZoneToStationTags[station.ZoneTag], station.TAGNAME)
 			}
 		}
 		return nil
 	})

 	g.Go(func() error {
-		var comps []struct {
+		var components []struct {
 			orm.Component
 			StationTag string `gorm:"column:station_tag"`
 		}
-		if err := db.Table("component").
-			Select("component.*, station.tagname as station_tag").
-			Joins("left join station on component.station_id = station.id").
-			Scan(&comps).Error; err != nil {
+		if err := db.Raw(compactMeasurementSQL(sql.MeasurementComponentHierarchy)).Scan(&components).Error; err != nil {
 			return fmt.Errorf("query components: %w", err)
 		}
-		for _, c := range comps {
-			mSet.AllCompNSPaths = append(mSet.AllCompNSPaths, c.NSPath)
-			mSet.AllCompTags = append(mSet.AllCompTags, c.Tag)
-			if c.StationTag != "" {
-				mSet.StationToCompNSPaths[c.StationTag] = append(mSet.StationToCompNSPaths[c.StationTag], c.NSPath)
+		for _, component := range components {
+			mSet.AllCompNSPaths = append(mSet.AllCompNSPaths, component.NSPath)
+			mSet.AllCompTags = append(mSet.AllCompTags, component.Tag)
+			if component.StationTag != "" {
+				mSet.StationToCompNSPaths[component.StationTag] = append(
+					mSet.StationToCompNSPaths[component.StationTag],
+					component.NSPath,
+				)
 			}
-			if c.NSPath != "" {
-				mSet.CompNSPathToCompTags[c.NSPath] = append(mSet.CompNSPathToCompTags[c.NSPath], c.Tag)
+			if component.NSPath != "" {
+				mSet.CompNSPathToCompTags[component.NSPath] = append(
+					mSet.CompNSPathToCompTags[component.NSPath],
+					component.Tag,
+				)
 			}
 		}
 		return nil
@ -118,20 +386,19 @@ func GetFullMeasurementSet(ctx context.Context, db *gorm.DB) (*orm.MeasurementSe
 			CompNSPath string `gorm:"column:comp_nspath"`
 			BayTag     string `gorm:"column:bay_tag"`
 		}
-		if err := db.Table("measurement").
-			Select("measurement.*, component.tag as comp_tag, component.nspath as comp_nspath, bay.tag as bay_tag").
-			Joins("left join component on measurement.component_uuid = component.global_uuid").
-			Joins("left join bay on measurement.bay_uuid = bay.bay_uuid").
-			Scan(&measurements).Error; err != nil {
+		if err := db.Raw(compactMeasurementSQL(sql.MeasurementTagHierarchy)).Scan(&measurements).Error; err != nil {
 			return fmt.Errorf("query measurements: %w", err)
 		}
-		for _, m := range measurements {
-			mSet.AllMeasTags = append(mSet.AllMeasTags, m.Tag)
-			if m.CompTag != "" {
-				mSet.CompTagToMeasTags[m.CompTag] = append(mSet.CompTagToMeasTags[m.CompTag], m.Tag)
+		for _, measurement := range measurements {
+			mSet.AllMeasTags = append(mSet.AllMeasTags, measurement.Tag)
+			if measurement.CompTag != "" {
+				mSet.CompTagToMeasTags[measurement.CompTag] = append(
+					mSet.CompTagToMeasTags[measurement.CompTag],
+					measurement.Tag,
+				)
 			}
-			if m.CompNSPath != "" && m.CompNSPath == m.BayTag {
-				mSet.CompNSPathToMeasTags[m.CompNSPath] = append(mSet.CompNSPathToMeasTags[m.CompNSPath], m.Tag)
+			if measurement.CompNSPath != "" && measurement.CompNSPath == measurement.BayTag {
+				mSet.CompNSPathToMeasTags[measurement.CompNSPath] = append(mSet.CompNSPathToMeasTags[measurement.CompNSPath], measurement.Tag)
 			}
 		}
 		return nil
@ -141,6 +408,22 @@ func GetFullMeasurementSet(ctx context.Context, db *gorm.DB) (*orm.MeasurementSe
 		return nil, err
 	}

+	appendBayDevCandidates(mSet, bayLinkedCompTags, bayDevColumnNames)
+
 	mSet.AllConfigTags = append(mSet.AllConfigTags, "bay")
 	return mSet, nil
 }
+
+func appendBayDevCandidates(mSet *orm.MeasurementSet, bayLinkedCompTags, bayDevColumnNames []string) {
+	if mSet == nil || len(bayLinkedCompTags) == 0 || len(bayDevColumnNames) == 0 {
+		return
+	}
+
+	mSet.AllMeasTags = append(mSet.AllMeasTags, bayDevColumnNames...)
+	for _, compTag := range bayLinkedCompTags {
+		mSet.CompTagToMeasTags[compTag] = append(
+			mSet.CompTagToMeasTags[compTag],
+			bayDevColumnNames...,
+		)
+	}
+}
--- a/database/query_component_measurement_bay_test.go
+++ b/database/query_component_measurement_bay_test.go
@ -0,0 +1,52 @@
+package database
+
+import (
+	"testing"
+
+	"modelRT/orm"
+
+	"github.com/stretchr/testify/require"
+)
+
+func TestAppendBayDevCandidatesRequiresBayLinkedComponent(t *testing.T) {
+	measurementSet := &orm.MeasurementSet{
+		AllMeasTags: []string{"current"},
+		CompTagToMeasTags: map[string][]string{
+			"linked-component":   {"current"},
+			"unlinked-component": {"voltage"},
+		},
+	}
+
+	appendBayDevCandidates(
+		measurementSet,
+		[]string{"linked-component"},
+		[]string{"dev_instruct", "dev_dyn_sense", "dev_fault_record"},
+	)
+
+	require.Equal(t,
+		[]string{"current", "dev_instruct", "dev_dyn_sense", "dev_fault_record"},
+		measurementSet.AllMeasTags,
+	)
+	require.Equal(t,
+		[]string{"current", "dev_instruct", "dev_dyn_sense", "dev_fault_record"},
+		measurementSet.CompTagToMeasTags["linked-component"],
+	)
+	require.Equal(t,
+		[]string{"voltage"},
+		measurementSet.CompTagToMeasTags["unlinked-component"],
+	)
+}
+
+func TestAppendBayDevCandidatesWithoutBayLinkDoesNothing(t *testing.T) {
+	measurementSet := &orm.MeasurementSet{
+		AllMeasTags: []string{"current"},
+		CompTagToMeasTags: map[string][]string{
+			"component": {"current"},
+		},
+	}
+
+	appendBayDevCandidates(measurementSet, nil, []string{"dev_instruct"})
+
+	require.Equal(t, []string{"current"}, measurementSet.AllMeasTags)
+	require.Equal(t, []string{"current"}, measurementSet.CompTagToMeasTags["component"])
+}
--- a/database/query_component_measurement_test.go
+++ b/database/query_component_measurement_test.go
@ -0,0 +1,271 @@
+package database
+
+import (
+	"context"
+	"errors"
+	"fmt"
+	"regexp"
+	"strings"
+	"testing"
+
+	"modelRT/common"
+
+	"github.com/DATA-DOG/go-sqlmock"
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
+	"gorm.io/driver/postgres"
+	"gorm.io/gorm"
+)
+
+func TestBuildMeasurementTokenValidationQuery(t *testing.T) {
+	tests := []struct {
+		name      string
+		token     string
+		wantArgs  []any
+		wantWhere string
+		wantErr   bool
+	}{
+		{
+			name:      "seven-part token",
+			token:     "grid.zone.station.nspath.component.bay.measurement",
+			wantArgs:  []any{"grid", "zone", "station", "nspath", "component", "measurement"},
+			wantWhere: "WHERE g.tagname = ?",
+		},
+		{
+			name:      "four-part token",
+			token:     "nspath.component.bay.measurement",
+			wantArgs:  []any{"nspath", "component", "measurement"},
+			wantWhere: "WHERE c.nspath = ?",
+		},
+		{
+			name:      "two-part token",
+			token:     "nspath.measurement",
+			wantArgs:  []any{"nspath", "measurement"},
+			wantWhere: "WHERE c.nspath = ?",
+		},
+		{
+			name:    "non-bay group",
+			token:   "nspath.component.rated.attribute",
+			wantErr: true,
+		},
+		{
+			name:    "empty segment",
+			token:   "nspath..bay.measurement",
+			wantErr: true,
+		},
+		{
+			name:    "invalid segment count",
+			token:   "grid.zone.station",
+			wantErr: true,
+		},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			query, args, err := buildMeasurementTokenValidationQuery(tt.token)
+			if tt.wantErr {
+				require.Error(t, err)
+				assert.ErrorIs(t, err, common.ErrInvalidMeasurementToken)
+				return
+			}
+
+			require.NoError(t, err)
+			assert.Contains(t, query, "INNER JOIN component AS c ON c.global_uuid = m.component_uuid")
+			assert.Contains(t, query, "INNER JOIN bay AS b ON b.bay_uuid = m.bay_uuid")
+			assert.Contains(t, query, tt.wantWhere)
+			assert.NotContains(t, query, "grid_idWHERE")
+			assert.Regexp(t, `grid_id\s+WHERE`, query)
+			assert.NotContains(t, query, "\n")
+			assert.NotContains(t, query, "\t")
+			assert.Equal(t, tt.wantArgs, args)
+		})
+	}
+}
+
+func TestQueryMeasurementByIDDoesNotLockRead(t *testing.T) {
+	sqlDB, mock, err := sqlmock.New()
+	require.NoError(t, err)
+	t.Cleanup(func() { _ = sqlDB.Close() })
+	db, err := gorm.Open(postgres.New(postgres.Config{Conn: sqlDB}), &gorm.Config{SkipDefaultTransaction: true})
+	require.NoError(t, err)
+
+	mock.ExpectQuery(`SELECT \* FROM "measurement" WHERE id = \$1 LIMIT \$2`).
+		WithArgs(int64(10), 1).
+		WillReturnRows(sqlmock.NewRows([]string{"id", "mode"}).AddRow(int64(10), int16(1)))
+
+	measurement, err := QueryMeasurementByID(context.Background(), db, 10)
+	require.NoError(t, err)
+	assert.Equal(t, int64(10), measurement.ID)
+	require.NoError(t, mock.ExpectationsWereMet())
+}
+
+func TestQueryMeasurementByIDForUpdateSelectsOnlyRequiredFields(t *testing.T) {
+	sqlDB, mock, err := sqlmock.New()
+	require.NoError(t, err)
+	t.Cleanup(func() { _ = sqlDB.Close() })
+	db, err := gorm.Open(postgres.New(postgres.Config{Conn: sqlDB}), &gorm.Config{SkipDefaultTransaction: true})
+	require.NoError(t, err)
+
+	mock.ExpectQuery(`SELECT "id","mode","data_source" FROM "measurement" WHERE id = \$1 LIMIT \$2 FOR UPDATE`).
+		WithArgs(int64(10), 1).
+		WillReturnRows(sqlmock.NewRows([]string{"id", "mode", "data_source"}).
+			AddRow(int64(10), int16(1), `{"type":1}`))
+
+	measurement, err := QueryMeasurementByIDForUpdate(context.Background(), db, 10)
+	require.NoError(t, err)
+	assert.Equal(t, int64(10), measurement.ID)
+	assert.Equal(t, int16(1), measurement.Mode)
+	require.NoError(t, mock.ExpectationsWereMet())
+}
+
+func TestMeasurementOperationAppendSQLIsSingleLine(t *testing.T) {
+	assert.NotContains(t, measurementOperationAppendSQL, "\n")
+	assert.NotContains(t, measurementOperationAppendSQL, "\r")
+	assert.NotContains(t, measurementOperationAppendSQL, "\t")
+}
+
+func TestUpdateMeasurementMode(t *testing.T) {
+	tests := []struct {
+		name      string
+		automatic bool
+		wantMode  int16
+	}{
+		{name: "manual", automatic: false, wantMode: 0},
+		{name: "automatic", automatic: true, wantMode: 1},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			sqlDB, mock, err := sqlmock.New()
+			require.NoError(t, err)
+			t.Cleanup(func() { _ = sqlDB.Close() })
+
+			db, err := gorm.Open(postgres.New(postgres.Config{Conn: sqlDB}), &gorm.Config{SkipDefaultTransaction: true})
+			require.NoError(t, err)
+
+			mock.ExpectExec(regexp.QuoteMeta(`UPDATE "measurement" SET "mode"=$1 WHERE id = $2`)).
+				WithArgs(tt.wantMode, int64(10)).
+				WillReturnResult(sqlmock.NewResult(0, 1))
+
+			err = UpdateMeasurementMode(context.Background(), db, 10, tt.automatic)
+			require.NoError(t, err)
+			require.NoError(t, mock.ExpectationsWereMet())
+		})
+	}
+}
+
+func TestValidateMeasurementToken(t *testing.T) {
+	tests := []struct {
+		name     string
+		count    int64
+		queryErr error
+		wantErr  error
+	}{
+		{name: "exists", count: 1},
+		{name: "not found", count: 0, wantErr: common.ErrMeasurementTokenNotFound},
+		{name: "ambiguous", count: 2, wantErr: common.ErrAmbiguousMeasurementToken},
+		{name: "query failure", queryErr: errors.New("database unavailable")},
+	}
+
+	const token = "nspath.measurement"
+	query, _, err := buildMeasurementTokenValidationQuery(token)
+	require.NoError(t, err)
+	expectedQuery := query
+	for i := 1; strings.Contains(expectedQuery, "?"); i++ {
+		expectedQuery = strings.Replace(expectedQuery, "?", fmt.Sprintf("$%d", i), 1)
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			sqlDB, mock, err := sqlmock.New()
+			require.NoError(t, err)
+			t.Cleanup(func() { _ = sqlDB.Close() })
+
+			db, err := gorm.Open(postgres.New(postgres.Config{Conn: sqlDB}), &gorm.Config{})
+			require.NoError(t, err)
+
+			expectation := mock.ExpectQuery(regexp.QuoteMeta(expectedQuery)).
+				WithArgs("nspath", "measurement")
+			if tt.queryErr != nil {
+				expectation.WillReturnError(tt.queryErr)
+			} else {
+				expectation.WillReturnRows(sqlmock.NewRows([]string{"count"}).AddRow(tt.count))
+			}
+
+			err = ValidateMeasurementToken(context.Background(), db, token)
+			if tt.wantErr != nil {
+				assert.ErrorIs(t, err, tt.wantErr)
+			} else if tt.queryErr != nil {
+				require.Error(t, err)
+				assert.Contains(t, err.Error(), tt.queryErr.Error())
+			} else {
+				require.NoError(t, err)
+			}
+			require.NoError(t, mock.ExpectationsWereMet())
+		})
+	}
+}
+
+func TestBuildMeasurementRowsQuerySeparatesLimitClause(t *testing.T) {
+	validationQuery, _, err := buildMeasurementTokenValidationQuery("nspath.measurement")
+	require.NoError(t, err)
+
+	query := buildMeasurementRowsQuery(validationQuery)
+	assert.NotContains(t, query, "?LIMIT")
+	assert.Regexp(t, `m\.tag = \?\s+LIMIT 2$`, query)
+	assert.NotContains(t, query, "\n")
+	assert.NotContains(t, query, "\t")
+}
+
+func TestQueryMeasurementByDataObjectToken(t *testing.T) {
+	sqlDB, mock, err := sqlmock.New()
+	require.NoError(t, err)
+	t.Cleanup(func() { _ = sqlDB.Close() })
+
+	db, err := gorm.Open(postgres.New(postgres.Config{Conn: sqlDB}), &gorm.Config{})
+	require.NoError(t, err)
+
+	const componentUUID = "70c190f2-8a60-42a9-b143-ec5f87e0aa6b"
+	mock.ExpectQuery(`(?s)SELECT m\.\*.*WHERE c\.nspath = \$1.*AND m\.tag = \$2.*LIMIT 2`).
+		WithArgs("nspath", "measurement").
+		WillReturnRows(sqlmock.NewRows([]string{
+			"id",
+			"tag",
+			"name",
+			"mode",
+			"size",
+			"data_source",
+			"event_plan",
+			"binding",
+			"component_uuid",
+		}).AddRow(
+			int64(10),
+			"measurement",
+			"A phase current",
+			int16(1),
+			10,
+			`{"type":1,"io_address":{"channel":"tm1"}}`,
+			`{"enabled":true}`,
+			`{"ct":{"ratio":1}}`,
+			componentUUID,
+		))
+	mock.ExpectQuery(`(?s)SELECT global_uuid, nspath, tag, grid, zone, station.*WHERE global_uuid = \$1.*LIMIT 1`).
+		WithArgs(componentUUID).
+		WillReturnRows(sqlmock.NewRows([]string{
+			"global_uuid",
+			"nspath",
+			"tag",
+			"grid",
+			"zone",
+			"station",
+		}).AddRow(componentUUID, "nspath", "component", "grid", "zone", "station"))
+
+	measurement, component, err := QueryMeasurementByDataObjectToken(context.Background(), db, "nspath.measurement")
+	require.NoError(t, err)
+	assert.Equal(t, int64(10), measurement.ID)
+	assert.Equal(t, int16(1), measurement.Mode)
+	assert.Equal(t, float64(1), measurement.DataSource["type"])
+	assert.Equal(t, "grid", component.GridName)
+	assert.Equal(t, "component", component.Tag)
+	require.NoError(t, mock.ExpectationsWereMet())
+}
--- a/database/query_component_parameter.go
+++ b/database/query_component_parameter.go
@ -0,0 +1,248 @@
+package database
+
+import (
+	"context"
+	"fmt"
+	"regexp"
+	"strings"
+
+	"modelRT/common"
+	"modelRT/constants"
+	"modelRT/model"
+	"modelRT/orm"
+	modelsql "modelRT/sql"
+
+	"gorm.io/gorm"
+)
+
+var parameterTableNamePattern = regexp.MustCompile(`^[A-Za-z_][A-Za-z0-9_]*$`)
+
+// ParameterDataObject contains the resolved metadata needed to query a
+// parameter attribute after its token has passed hierarchy validation.
+type ParameterDataObject struct {
+	Component      orm.Component
+	Project        orm.ProjectManager
+	TableName      string
+	AttributeGroup string
+	AttributeName  string
+	AttributeType  string
+}
+
+// QueryParameterByDataObjectToken validates a four-part or seven-part
+// parameter token. The component group resolves directly to the component
+// table; other groups resolve through project_manager and a dynamic table.
+func QueryParameterByDataObjectToken(ctx context.Context, db *gorm.DB, token string) (*ParameterDataObject, error) {
+	componentQuery, componentArgs, parts, err := buildParameterComponentQuery(token)
+	if err != nil {
+		return nil, err
+	}
+
+	var components []orm.Component
+	if err := db.WithContext(ctx).Raw(componentQuery, componentArgs...).Scan(&components).Error; err != nil {
+		return nil, fmt.Errorf("query component for parameter token %q: %w", token, err)
+	}
+
+	switch len(components) {
+	case 0:
+		return nil, fmt.Errorf("%w: component hierarchy for %q", common.ErrParameterTokenNotFound, token)
+	case 1:
+		// Continue by resolving the component model and attribute group.
+	default:
+		return nil, fmt.Errorf("%w: component hierarchy for %q matched more than one record", common.ErrAmbiguousParameterToken, token)
+	}
+
+	attributeGroup := parts[len(parts)-2]
+	attributeName := parts[len(parts)-1]
+	component := components[0]
+	if attributeGroup == "component" {
+		attributeType, err := queryParameterAttributeType(ctx, db, "component", attributeName, token)
+		if err != nil {
+			return nil, err
+		}
+		return &ParameterDataObject{
+			Component:      component,
+			TableName:      "component",
+			AttributeGroup: attributeGroup,
+			AttributeName:  attributeName,
+			AttributeType:  attributeType,
+		}, nil
+	}
+
+	var projects []orm.ProjectManager
+	if err := db.WithContext(ctx).
+		Where("tag = ? AND group_name = ?", component.ModelName, attributeGroup).
+		Limit(2).
+		Find(&projects).Error; err != nil {
+		return nil, fmt.Errorf("query project mapping for parameter token %q: %w", token, err)
+	}
+
+	switch len(projects) {
+	case 0:
+		return nil, fmt.Errorf("%w: model %q does not define attribute group %q", common.ErrParameterTokenNotFound, component.ModelName, attributeGroup)
+	case 1:
+		// Continue by validating the dynamic table and attribute.
+	default:
+		return nil, fmt.Errorf("%w: model %q and attribute group %q matched more than one project", common.ErrAmbiguousParameterToken, component.ModelName, attributeGroup)
+	}
+
+	project := projects[0]
+	if !validParameterTableName(project.Name) {
+		return nil, fmt.Errorf("project mapping for parameter token %q contains invalid table name %q", token, project.Name)
+	}
+	attributeType, err := queryParameterAttributeType(ctx, db, project.Name, attributeName, token)
+	if err != nil {
+		return nil, err
+	}
+
+	var recordCount int64
+	if err := db.WithContext(ctx).
+		Table(project.Name).
+		Where("global_uuid = ? AND attribute_group = ?", component.GlobalUUID, attributeGroup).
+		Count(&recordCount).Error; err != nil {
+		return nil, fmt.Errorf("query dynamic record for parameter token %q: %w", token, err)
+	}
+
+	switch {
+	case recordCount == 0:
+		return nil, fmt.Errorf("%w: component %q has no %q parameter record", common.ErrParameterTokenNotFound, component.Tag, attributeGroup)
+	case recordCount > 1:
+		return nil, fmt.Errorf("%w: component %q has %d %q parameter records", common.ErrAmbiguousParameterToken, component.Tag, recordCount, attributeGroup)
+	}
+
+	return &ParameterDataObject{
+		Component:      component,
+		Project:        project,
+		TableName:      project.Name,
+		AttributeGroup: attributeGroup,
+		AttributeName:  attributeName,
+		AttributeType:  attributeType,
+	}, nil
+}
+
+// QueryParameterDataObjectValue returns token7 from the component row or from
+// a dynamic parameter row identified during token validation.
+func QueryParameterDataObjectValue(ctx context.Context, db *gorm.DB, parameter *ParameterDataObject) (any, error) {
+	if parameter == nil {
+		return nil, fmt.Errorf("parameter data object is nil")
+	}
+
+	var record map[string]any
+	query := db.WithContext(ctx).Table(parameter.TableName)
+	if parameter.AttributeGroup == "component" {
+		query = query.Where("tag = ?", parameter.Component.Tag)
+	} else {
+		query = query.Where("global_uuid = ? AND attribute_group = ?", parameter.Component.GlobalUUID, parameter.AttributeGroup)
+	}
+	result := query.Take(&record)
+	if result.Error != nil {
+		return nil, fmt.Errorf("query parameter value from table %q: %w", parameter.TableName, result.Error)
+	}
+
+	value, ok := record[parameter.AttributeName]
+	if !ok {
+		return nil, fmt.Errorf("parameter column %q is missing from table %q result", parameter.AttributeName, parameter.TableName)
+	}
+	return value, nil
+}
+
+// UpdateParameterDataObjectValue writes token7 to the dynamic parameter row
+// resolved from a data-object token. Component-table attributes are not
+// supported by the data-object update API.
+func UpdateParameterDataObjectValue(ctx context.Context, db *gorm.DB, parameter *ParameterDataObject, value any) error {
+	if parameter == nil {
+		return fmt.Errorf("parameter data object is nil")
+	}
+	if parameter.AttributeGroup == "component" {
+		return fmt.Errorf("component data-object updates are not supported")
+	}
+	if !validParameterTableName(parameter.TableName) {
+		return fmt.Errorf("invalid parameter table name %q", parameter.TableName)
+	}
+
+	result := db.WithContext(ctx).
+		Table(parameter.TableName).
+		Where("global_uuid = ? AND attribute_group = ?", parameter.Component.GlobalUUID, parameter.AttributeGroup).
+		Update(parameter.AttributeName, value)
+	if result.Error != nil {
+		return fmt.Errorf("update parameter %q in table %q: %w", parameter.AttributeName, parameter.TableName, result.Error)
+	}
+	if result.RowsAffected == 0 {
+		return fmt.Errorf("update parameter %q in table %q affected no rows", parameter.AttributeName, parameter.TableName)
+	}
+	return nil
+}
+
+func validParameterTableName(tableName string) bool {
+	return parameterTableNamePattern.MatchString(tableName) && constants.IsSupportedParameterTableName(tableName)
+}
+
+// QueryParameterAttributeDescription returns the display name registered for
+// token7 in basic.attribute.
+func QueryParameterAttributeDescription(ctx context.Context, db *gorm.DB, attributeName string) (string, error) {
+	var rows []struct {
+		Description string `gorm:"column:attribute_name"`
+	}
+	if err := db.WithContext(ctx).
+		Raw(modelsql.ParameterAttributeDescription, attributeName).
+		Scan(&rows).Error; err != nil {
+		return "", fmt.Errorf("query parameter description for attribute %q: %w", attributeName, err)
+	}
+
+	switch len(rows) {
+	case 0:
+		return "", fmt.Errorf("parameter description not found for attribute %q", attributeName)
+	case 1:
+		return rows[0].Description, nil
+	default:
+		return "", fmt.Errorf("ambiguous parameter description for attribute %q", attributeName)
+	}
+}
+
+func queryParameterAttributeType(ctx context.Context, db *gorm.DB, tableName, attributeName, token string) (string, error) {
+	var attributeType string
+	result := db.WithContext(ctx).
+		Raw(modelsql.ParameterAttributeColumnType, tableName, attributeName).
+		Scan(&attributeType)
+	if result.Error != nil {
+		return "", fmt.Errorf("validate attribute column for parameter token %q: %w", token, result.Error)
+	}
+	if result.RowsAffected == 0 || attributeType == "" {
+		return "", fmt.Errorf("%w: column %q does not exist in parameter table %q", common.ErrParameterTokenNotFound, attributeName, tableName)
+	}
+	return strings.ToUpper(attributeType), nil
+}
+
+func buildParameterComponentQuery(token string) (string, []any, []string, error) {
+	dataObjectType, err := model.ClassifyDataObjectToken(token)
+	if err != nil {
+		return "", nil, nil, fmt.Errorf("%w %q: %v", common.ErrInvalidParameterToken, token, err)
+	}
+	if dataObjectType != constants.DataObjectTypeParameter {
+		return "", nil, nil, fmt.Errorf("%w %q: token does not identify a parameter", common.ErrInvalidParameterToken, token)
+	}
+
+	parts := strings.Split(token, ".")
+	var where string
+	var args []any
+	switch len(parts) {
+	case 7:
+		where = modelsql.ParameterSevenPartTokenWhere
+		args = []any{parts[0], parts[1], parts[2], parts[3], parts[4]}
+	case 4:
+		where = modelsql.ParameterFourPartTokenWhere
+		args = []any{parts[0], parts[1]}
+	default:
+		return "", nil, nil, fmt.Errorf("%w %q: expected 4 or 7 segments", common.ErrInvalidParameterToken, token)
+	}
+
+	query := compactParameterSQL(strings.Join([]string{
+		modelsql.ParameterComponentQueryBase,
+		where,
+		modelsql.ParameterLimitTwo,
+	}, "\n"))
+	return query, args, parts, nil
+}
+
+func compactParameterSQL(statement string) string {
+	return strings.Join(strings.Fields(statement), " ")
+}
--- a/database/query_component_parameter_test.go
+++ b/database/query_component_parameter_test.go
@ -0,0 +1,286 @@
+package database
+
+import (
+	"context"
+	"regexp"
+	"testing"
+
+	"modelRT/common"
+	"modelRT/orm"
+
+	"github.com/DATA-DOG/go-sqlmock"
+	"github.com/gofrs/uuid"
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
+	"gorm.io/driver/postgres"
+	"gorm.io/gorm"
+)
+
+func TestBuildParameterComponentQuery(t *testing.T) {
+	tests := []struct {
+		name      string
+		token     string
+		wantArgs  []any
+		wantWhere string
+		wantErr   bool
+	}{
+		{
+			name:      "seven-part parameter",
+			token:     "grid.zone.station.nspath.component.stable.attribute",
+			wantArgs:  []any{"grid", "zone", "station", "nspath", "component"},
+			wantWhere: "WHERE g.tagname = ?",
+		},
+		{
+			name:      "four-part local parameter",
+			token:     "nspath.component.rated.attribute",
+			wantArgs:  []any{"nspath", "component"},
+			wantWhere: "s.is_local = TRUE",
+		},
+		{
+			name:    "measurement token",
+			token:   "nspath.component.bay.measurement",
+			wantErr: true,
+		},
+		{
+			name:    "empty segment",
+			token:   "nspath..stable.attribute",
+			wantErr: true,
+		},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			query, args, _, err := buildParameterComponentQuery(tt.token)
+			if tt.wantErr {
+				require.Error(t, err)
+				assert.ErrorIs(t, err, common.ErrInvalidParameterToken)
+				return
+			}
+
+			require.NoError(t, err)
+			assert.Contains(t, query, "INNER JOIN station AS s ON s.id = c.station_id")
+			assert.Contains(t, query, tt.wantWhere)
+			assert.Equal(t, tt.wantArgs, args)
+			assert.NotContains(t, query, "\n")
+			assert.NotContains(t, query, "\t")
+		})
+	}
+}
+
+func TestQueryParameterByDataObjectToken(t *testing.T) {
+	sqlDB, mock, err := sqlmock.New()
+	require.NoError(t, err)
+	t.Cleanup(func() { _ = sqlDB.Close() })
+
+	db, err := gorm.Open(postgres.New(postgres.Config{Conn: sqlDB}), &gorm.Config{})
+	require.NoError(t, err)
+
+	const (
+		token         = "grid.zone.station.nspath.component.stable.rated_voltage"
+		componentUUID = "70c190f2-8a60-42a9-b143-ec5f87e0aa6b"
+	)
+
+	mock.ExpectQuery(`(?s)SELECT c\.\*.*WHERE g\.tagname = \$1.*AND c\.tag = \$5.*LIMIT 2`).
+		WithArgs("grid", "zone", "station", "nspath", "component").
+		WillReturnRows(sqlmock.NewRows([]string{
+			"global_uuid", "nspath", "tag", "model_name", "station_id",
+		}).AddRow(componentUUID, "nspath", "component", "bus_1", int64(10)))
+
+	mock.ExpectQuery(`SELECT \* FROM "project_manager" WHERE tag = \$1 AND group_name = \$2 LIMIT \$3`).
+		WithArgs("bus_1", "stable", 2).
+		WillReturnRows(sqlmock.NewRows([]string{
+			"id", "name", "tag", "meta_model", "group_name", "link_type", "check_state", "ispublic",
+		}).AddRow(
+			int32(1),
+			"bus_bus_1_stable",
+			"bus_1",
+			"bus",
+			"stable",
+			int32(0),
+			`{"checkState":[{"name":"rated_voltage","checked":1}]}`,
+			false,
+		))
+
+	mock.ExpectQuery(`(?s)SELECT pg_catalog\.format_type.*pg_catalog\.pg_attribute.*c\.relname = \$1.*a\.attname = \$2.*LIMIT 1`).
+		WithArgs("bus_bus_1_stable", "rated_voltage").
+		WillReturnRows(sqlmock.NewRows([]string{"format_type"}).AddRow("double precision"))
+
+	mock.ExpectQuery(regexp.QuoteMeta(`SELECT count(*) FROM "bus_bus_1_stable" WHERE global_uuid = $1 AND attribute_group = $2`)).
+		WithArgs(componentUUID, "stable").
+		WillReturnRows(sqlmock.NewRows([]string{"count"}).AddRow(int64(1)))
+
+	parameter, err := QueryParameterByDataObjectToken(context.Background(), db, token)
+	require.NoError(t, err)
+	assert.Equal(t, "component", parameter.Component.Tag)
+	assert.Equal(t, "bus_bus_1_stable", parameter.Project.Name)
+	assert.Equal(t, "bus_bus_1_stable", parameter.TableName)
+	assert.Equal(t, "stable", parameter.AttributeGroup)
+	assert.Equal(t, "rated_voltage", parameter.AttributeName)
+	assert.Equal(t, "DOUBLE PRECISION", parameter.AttributeType)
+	require.NoError(t, mock.ExpectationsWereMet())
+}
+
+func TestQueryParameterDataObjectValue(t *testing.T) {
+	sqlDB, mock, err := sqlmock.New()
+	require.NoError(t, err)
+	t.Cleanup(func() { _ = sqlDB.Close() })
+
+	db, err := gorm.Open(postgres.New(postgres.Config{Conn: sqlDB}), &gorm.Config{})
+	require.NoError(t, err)
+
+	const componentUUID = "70c190f2-8a60-42a9-b143-ec5f87e0aa6b"
+	parsedUUID, err := uuid.FromString(componentUUID)
+	require.NoError(t, err)
+	parameter := &ParameterDataObject{
+		Component: orm.Component{GlobalUUID: parsedUUID},
+		Project: orm.ProjectManager{
+			Name: "bus_bus_1_stable",
+		},
+		TableName:      "bus_bus_1_stable",
+		AttributeGroup: "stable",
+		AttributeName:  "rated_voltage",
+	}
+
+	mock.ExpectQuery(regexp.QuoteMeta(`SELECT * FROM "bus_bus_1_stable" WHERE global_uuid = $1 AND attribute_group = $2 LIMIT $3`)).
+		WithArgs(componentUUID, "stable", 1).
+		WillReturnRows(sqlmock.NewRows([]string{
+			"global_uuid", "attribute_group", "rated_voltage",
+		}).AddRow(componentUUID, "stable", float64(220)))
+
+	value, err := QueryParameterDataObjectValue(context.Background(), db, parameter)
+	require.NoError(t, err)
+	assert.Equal(t, float64(220), value)
+	require.NoError(t, mock.ExpectationsWereMet())
+}
+
+func TestUpdateParameterDataObjectValue(t *testing.T) {
+	sqlDB, mock, err := sqlmock.New()
+	require.NoError(t, err)
+	t.Cleanup(func() { _ = sqlDB.Close() })
+
+	db, err := gorm.Open(postgres.New(postgres.Config{Conn: sqlDB}), &gorm.Config{SkipDefaultTransaction: true})
+	require.NoError(t, err)
+
+	const componentUUID = "70c190f2-8a60-42a9-b143-ec5f87e0aa6b"
+	parsedUUID, err := uuid.FromString(componentUUID)
+	require.NoError(t, err)
+	parameter := &ParameterDataObject{
+		Component:      orm.Component{GlobalUUID: parsedUUID},
+		TableName:      "bus_bus_1_rated",
+		AttributeGroup: "rated",
+		AttributeName:  "unom_kv",
+	}
+
+	mock.ExpectExec(regexp.QuoteMeta(`UPDATE "bus_bus_1_rated" SET "unom_kv"=$1 WHERE global_uuid = $2 AND attribute_group = $3`)).
+		WithArgs("15.2", componentUUID, "rated").
+		WillReturnResult(sqlmock.NewResult(0, 1))
+
+	err = UpdateParameterDataObjectValue(context.Background(), db, parameter, "15.2")
+	require.NoError(t, err)
+	require.NoError(t, mock.ExpectationsWereMet())
+}
+
+func TestUpdateParameterDataObjectValueRejectsComponent(t *testing.T) {
+	err := UpdateParameterDataObjectValue(context.Background(), &gorm.DB{}, &ParameterDataObject{
+		TableName:      "component",
+		AttributeGroup: "component",
+		AttributeName:  "global_uuid",
+	}, "uuid")
+	require.Error(t, err)
+	assert.Contains(t, err.Error(), "not supported")
+}
+
+func TestQueryComponentParameterByDataObjectToken(t *testing.T) {
+	sqlDB, mock, err := sqlmock.New()
+	require.NoError(t, err)
+	t.Cleanup(func() { _ = sqlDB.Close() })
+
+	db, err := gorm.Open(postgres.New(postgres.Config{Conn: sqlDB}), &gorm.Config{})
+	require.NoError(t, err)
+
+	const (
+		token         = "grid.zone.station.nspath.component.component.description"
+		componentUUID = "70c190f2-8a60-42a9-b143-ec5f87e0aa6b"
+	)
+	mock.ExpectQuery(`(?s)SELECT c\.\*.*WHERE g\.tagname = \$1.*AND c\.tag = \$5.*LIMIT 2`).
+		WithArgs("grid", "zone", "station", "nspath", "component").
+		WillReturnRows(sqlmock.NewRows([]string{
+			"global_uuid", "nspath", "tag", "model_name", "grid", "zone", "station", "station_id",
+		}).AddRow(componentUUID, "nspath", "component", "bus_1", "grid", "zone", "station", int64(10)))
+	mock.ExpectQuery(`(?s)SELECT pg_catalog\.format_type.*c\.relname = \$1.*a\.attname = \$2.*LIMIT 1`).
+		WithArgs("component", "description").
+		WillReturnRows(sqlmock.NewRows([]string{"format_type"}).AddRow("character varying(512)"))
+
+	parameter, err := QueryParameterByDataObjectToken(context.Background(), db, token)
+	require.NoError(t, err)
+	assert.Equal(t, "component", parameter.TableName)
+	assert.Equal(t, "component", parameter.AttributeGroup)
+	assert.Equal(t, "description", parameter.AttributeName)
+	assert.Equal(t, "CHARACTER VARYING(512)", parameter.AttributeType)
+	assert.Empty(t, parameter.Project.Name)
+	require.NoError(t, mock.ExpectationsWereMet())
+}
+
+func TestQueryComponentParameterValue(t *testing.T) {
+	sqlDB, mock, err := sqlmock.New()
+	require.NoError(t, err)
+	t.Cleanup(func() { _ = sqlDB.Close() })
+
+	db, err := gorm.Open(postgres.New(postgres.Config{Conn: sqlDB}), &gorm.Config{})
+	require.NoError(t, err)
+
+	parameter := &ParameterDataObject{
+		Component:      orm.Component{Tag: "component"},
+		TableName:      "component",
+		AttributeGroup: "component",
+		AttributeName:  "description",
+	}
+	mock.ExpectQuery(regexp.QuoteMeta(`SELECT * FROM "component" WHERE tag = $1 LIMIT $2`)).
+		WithArgs("component", 1).
+		WillReturnRows(sqlmock.NewRows([]string{"tag", "description"}).AddRow("component", "测试组件"))
+
+	value, err := QueryParameterDataObjectValue(context.Background(), db, parameter)
+	require.NoError(t, err)
+	assert.Equal(t, "测试组件", value)
+	require.NoError(t, mock.ExpectationsWereMet())
+}
+
+func TestQueryParameterAttributeDescription(t *testing.T) {
+	sqlDB, mock, err := sqlmock.New()
+	require.NoError(t, err)
+	t.Cleanup(func() { _ = sqlDB.Close() })
+
+	db, err := gorm.Open(postgres.New(postgres.Config{Conn: sqlDB}), &gorm.Config{})
+	require.NoError(t, err)
+
+	mock.ExpectQuery(`(?s)SELECT attribute_name.*FROM basic\.attribute.*WHERE attribute = \$1.*LIMIT 2`).
+		WithArgs("rated_voltage").
+		WillReturnRows(sqlmock.NewRows([]string{"attribute_name"}).AddRow("额定电压"))
+
+	description, err := QueryParameterAttributeDescription(context.Background(), db, "rated_voltage")
+	require.NoError(t, err)
+	assert.Equal(t, "额定电压", description)
+	require.NoError(t, mock.ExpectationsWereMet())
+}
+
+func TestQueryParameterByDataObjectTokenComponentNotFound(t *testing.T) {
+	sqlDB, mock, err := sqlmock.New()
+	require.NoError(t, err)
+	t.Cleanup(func() { _ = sqlDB.Close() })
+
+	db, err := gorm.Open(postgres.New(postgres.Config{Conn: sqlDB}), &gorm.Config{})
+	require.NoError(t, err)
+
+	mock.ExpectQuery(`(?s)SELECT c\.\*.*WHERE c\.nspath = \$1.*AND c\.tag = \$2.*s\.is_local = TRUE.*LIMIT 2`).
+		WithArgs("nspath", "component").
+		WillReturnRows(sqlmock.NewRows([]string{"global_uuid"}))
+
+	_, err = QueryParameterByDataObjectToken(
+		context.Background(),
+		db,
+		"nspath.component.stable.rated_voltage",
+	)
+	require.Error(t, err)
+	assert.ErrorIs(t, err, common.ErrParameterTokenNotFound)
+	require.NoError(t, mock.ExpectationsWereMet())
+}
--- a/database/query_measurement.go
+++ b/database/query_measurement.go
@ -1,62 +0,0 @@
-// Package database define database operation functions
-package database
-
-import (
-	"context"
-	"time"
-
-	"modelRT/orm"
-
-	"gorm.io/gorm"
-	"gorm.io/gorm/clause"
-)
-
-// QueryMeasurementByID return the result of query circuit diagram component measurement info by id from postgresDB
-func QueryMeasurementByID(ctx context.Context, tx *gorm.DB, id int64) (orm.Measurement, error) {
-	var measurement orm.Measurement
-	// ctx超时判断
-	cancelCtx, cancel := context.WithTimeout(ctx, 5*time.Second)
-	defer cancel()
-	result := tx.WithContext(cancelCtx).
-		Where("id = ?", id).
-		Clauses(clause.Locking{Strength: "UPDATE"}).
-		First(&measurement)
-
-	if result.Error != nil {
-		return orm.Measurement{}, result.Error
-	}
-	return measurement, nil
-}
-
-// QueryMeasurementByToken define function query circuit diagram component measurement info by token from postgresDB
-func QueryMeasurementByToken(ctx context.Context, tx *gorm.DB, token string) (orm.Measurement, error) {
-	// TODO parse token to avoid SQL injection
-
-	var component orm.Measurement
-	// ctx超时判断
-	cancelCtx, cancel := context.WithTimeout(ctx, 5*time.Second)
-	defer cancel()
-	result := tx.WithContext(cancelCtx).
-		Where(" = ?", token).
-		Clauses(clause.Locking{Strength: "UPDATE"}).
-		First(&component)
-
-	if result.Error != nil {
-		return orm.Measurement{}, result.Error
-	}
-	return component, nil
-}
-
-// GetAllMeasurements define func to query all measurement info from postgresDB
-func GetAllMeasurements(ctx context.Context, tx *gorm.DB) ([]orm.Measurement, error) {
-	var measurements []orm.Measurement
-
-	// ctx超时判断
-	cancelCtx, cancel := context.WithTimeout(ctx, 5*time.Second)
-	defer cancel()
-	result := tx.WithContext(cancelCtx).Clauses(clause.Locking{Strength: "UPDATE"}).Find(&measurements)
-	if result.Error != nil {
-		return nil, result.Error
-	}
-	return measurements, nil
-}
--- a/deploy/redis-test-data/real-time-compute/compute_data_injection.go
+++ b/deploy/redis-test-data/real-time-compute/compute_data_injection.go
@ -88,7 +88,7 @@ func generateNormalData(baseValue, normalBase float64) []float64 {
 func main() {
 	rootCtx := context.Background()

-	pgURI := fmt.Sprintf("host=%s port=%d user=%s password=%s dbname=%s", "192.168.1.101", 5432, "postgres", "coslight", "demo")
+	pgURI := fmt.Sprintf("host=%s port=%d user=%s password=%s dbname=%s", "localhost", 5432, "postgres", "coslight", "develop_env")

 	postgresDBClient, err := gorm.Open(postgres.Open(pgURI))
 	if err != nil {
@ -164,7 +164,6 @@ func main() {
 			}

 			datas = generateMixedData(highMin, lowMin, highBase, lowBase, baseValue, normalBase)
-			// log.Printf("key:%s\n datas:%v\n", key, datas)

 			allHigh := true
 			for i := highStart; i < highEnd; i++ {
--- a/deploy/redis-test-data/util/rand.go
+++ b/deploy/redis-test-data/util/rand.go
@ -3,6 +3,7 @@ package util

 import (
 	"fmt"
+	"strings"

 	"modelRT/orm"
 )
@ -61,7 +62,7 @@ func ProcessMeasurements(measurements []orm.Measurement) map[string]CalculationR
 		device, _ := ioAddress["device"].(string)
 		channel, _ := ioAddress["channel"].(string)

-		result := fmt.Sprintf("%s:%s:phasor:%s", station, device, channel)
+		result := strings.ToLower(fmt.Sprintf("%s:%s:phasor:%s", station, device, channel))
 		if measurement.EventPlan == nil {
 			continue
 		}
--- a/diagram/context.go
+++ b/diagram/context.go
@ -0,0 +1,20 @@
+package diagram
+
+import (
+	"context"
+	"fmt"
+
+	"modelRT/common"
+	"modelRT/constants"
+)
+
+func clientTokenFromContext(ctx context.Context) (string, error) {
+	if ctx == nil {
+		return "", common.ErrGetClientToken
+	}
+	token, ok := ctx.Value(constants.CtxKeyClientToken).(string)
+	if !ok || token == "" {
+		return "", fmt.Errorf("%w: missing or invalid context value", common.ErrGetClientToken)
+	}
+	return token, nil
+}
--- a/diagram/context_test.go
+++ b/diagram/context_test.go
@ -0,0 +1,38 @@
+package diagram
+
+import (
+	"context"
+	"testing"
+
+	"modelRT/common"
+	"modelRT/constants"
+
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
+)
+
+func TestClientTokenFromContext(t *testing.T) {
+	ctx := context.WithValue(context.Background(), constants.CtxKeyClientToken, "test-token")
+	token, err := clientTokenFromContext(ctx)
+	require.NoError(t, err)
+	assert.Equal(t, "test-token", token)
+}
+
+func TestClientTokenFromContextReturnsErrorWhenMissing(t *testing.T) {
+	for _, ctx := range []context.Context{nil, context.Background()} {
+		_, err := clientTokenFromContext(ctx)
+		require.Error(t, err)
+		assert.ErrorIs(t, err, common.ErrGetClientToken)
+	}
+}
+
+func TestRedisConstructorsReturnErrorInsteadOfPanickingWithoutToken(t *testing.T) {
+	ctx := context.Background()
+
+	_, err := NewRedisZSet(ctx, "zset", 0, false)
+	assert.ErrorIs(t, err, common.ErrGetClientToken)
+	_, err = NewRedisSet(ctx, "set", 0, false)
+	assert.ErrorIs(t, err, common.ErrGetClientToken)
+	_, err = NewRedisHash(ctx, "hash", 0, false)
+	assert.ErrorIs(t, err, common.ErrGetClientToken)
+}
--- a/diagram/redis_client.go
+++ b/diagram/redis_client.go
@ -3,6 +3,8 @@ package diagram

 import (
 	"context"
+	"fmt"
+	"strconv"

 	"github.com/redis/go-redis/v9"
 )
@ -12,6 +14,46 @@ type RedisClient struct {
 	Client *redis.Client
 }

+// QueryLatestMeasurementValue returns the score whose member contains the
+// greatest numeric timestamp. Measurement ZSets currently store timestamp in
+// member and measurement value in score.
+func (rc *RedisClient) QueryLatestMeasurementValue(ctx context.Context, key string) (float64, error) {
+	if rc.Client == nil {
+		return 0, fmt.Errorf("redis client is not initialized")
+	}
+
+	members, err := rc.Client.ZRangeWithScores(ctx, key, 0, -1).Result()
+	if err != nil {
+		return 0, err
+	}
+	return latestMeasurementValue(members, key)
+}
+
+func latestMeasurementValue(members []redis.Z, key string) (float64, error) {
+	if len(members) == 0 {
+		return 0, fmt.Errorf("real-time measurement value not found for key %q", key)
+	}
+
+	var latestTimestamp int64
+	var latestValue float64
+	found := false
+	for _, member := range members {
+		timestamp, err := strconv.ParseInt(fmt.Sprint(member.Member), 10, 64)
+		if err != nil {
+			continue
+		}
+		if !found || timestamp > latestTimestamp {
+			latestTimestamp = timestamp
+			latestValue = member.Score
+			found = true
+		}
+	}
+	if !found {
+		return 0, fmt.Errorf("real-time measurement timestamps are invalid for key %q", key)
+	}
+	return latestValue, nil
+}
+
 // NewRedisClient define func of new redis client instance
 func NewRedisClient() *RedisClient {
 	return &RedisClient{
--- a/diagram/redis_client_test.go
+++ b/diagram/redis_client_test.go
@ -0,0 +1,28 @@
+package diagram
+
+import (
+	"testing"
+
+	"github.com/redis/go-redis/v9"
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
+)
+
+func TestLatestMeasurementValueUsesMemberTimestamp(t *testing.T) {
+	value, err := latestMeasurementValue([]redis.Z{
+		{Member: "100", Score: 999},
+		{Member: "300", Score: 12},
+		{Member: "200", Score: 500},
+	}, "measurement-key")
+
+	require.NoError(t, err)
+	assert.Equal(t, float64(12), value)
+}
+
+func TestLatestMeasurementValueRejectsMissingOrInvalidTimestamps(t *testing.T) {
+	_, err := latestMeasurementValue(nil, "measurement-key")
+	require.Error(t, err)
+
+	_, err = latestMeasurementValue([]redis.Z{{Member: "invalid", Score: 1}}, "measurement-key")
+	require.Error(t, err)
+}
--- a/diagram/redis_hash.go
+++ b/diagram/redis_hash.go
@ -18,14 +18,17 @@ type RedisHash struct {
 }

 // NewRedisHash define func of new redis hash instance
-func NewRedisHash(ctx context.Context, hashKey string, lockLeaseTime uint64, needRefresh bool) *RedisHash {
-	token := ctx.Value("client_token").(string)
+func NewRedisHash(ctx context.Context, hashKey string, lockLeaseTime uint64, needRefresh bool) (*RedisHash, error) {
+	token, err := clientTokenFromContext(ctx)
+	if err != nil {
+		return nil, err
+	}
 	return &RedisHash{
 		ctx:           ctx,
 		hashKey:       hashKey,
 		rwLocker:      locker.InitRWLocker(hashKey, token, lockLeaseTime, needRefresh),
 		storageClient: GetRedisClientInstance(),
-	}
+	}, nil
 }

 // SetRedisHashByMap define func of set redis hash by map struct
--- a/diagram/redis_set.go
+++ b/diagram/redis_set.go
@ -21,15 +21,18 @@ type RedisSet struct {
 }

 // NewRedisSet define func of new redis set instance
-func NewRedisSet(ctx context.Context, setKey string, lockLeaseTime uint64, needRefresh bool) *RedisSet {
-	token := ctx.Value("client_token").(string)
+func NewRedisSet(ctx context.Context, setKey string, lockLeaseTime uint64, needRefresh bool) (*RedisSet, error) {
+	token, err := clientTokenFromContext(ctx)
+	if err != nil {
+		return nil, err
+	}
 	return &RedisSet{
 		ctx:           ctx,
 		key:           setKey,
 		rwLocker:      locker.InitRWLocker(setKey, token, lockLeaseTime, needRefresh),
 		storageClient: GetRedisClientInstance(),
 		logger:        logger.GetLoggerInstance(),
-	}
+	}, nil
 }

 // SADD define func of add redis set by members
--- a/diagram/redis_zset.go
+++ b/diagram/redis_zset.go
@ -18,13 +18,16 @@ type RedisZSet struct {
 }

 // NewRedisZSet define func of new redis zset instance
-func NewRedisZSet(ctx context.Context, key string, lockLeaseTime uint64, needRefresh bool) *RedisZSet {
-	token := ctx.Value("client_token").(string)
+func NewRedisZSet(ctx context.Context, key string, lockLeaseTime uint64, needRefresh bool) (*RedisZSet, error) {
+	token, err := clientTokenFromContext(ctx)
+	if err != nil {
+		return nil, err
+	}
 	return &RedisZSet{
 		ctx:           ctx,
 		rwLocker:      locker.InitRWLocker(key, token, lockLeaseTime, needRefresh),
 		storageClient: GetRedisClientInstance(),
-	}
+	}, nil
 }

 // ZADD define func of add redis zset by members
@ -44,6 +47,26 @@ func (rs *RedisZSet) ZADD(setKey string, score float64, member any) error {
 	return nil
 }

+// ZREPLACE atomically removes all existing members and adds one new member.
+func (rs *RedisZSet) ZREPLACE(setKey string, score float64, member any) error {
+	if err := rs.rwLocker.WLock(rs.ctx); err != nil {
+		logger.Error(rs.ctx, "lock wLock by setKey failed", "set_key", setKey, "error", err)
+		return err
+	}
+	defer rs.rwLocker.UnWLock(rs.ctx)
+
+	_, err := rs.storageClient.TxPipelined(rs.ctx, func(pipe redis.Pipeliner) error {
+		pipe.Del(rs.ctx, setKey)
+		pipe.ZAdd(rs.ctx, setKey, redis.Z{Score: score, Member: member})
+		return nil
+	})
+	if err != nil {
+		logger.Error(rs.ctx, "replace zset member failed", "set_key", setKey, "member", member, "error", err)
+		return err
+	}
+	return nil
+}
+
 // ZRANGE define func of returns the specified range of elements in the sorted set stored by key
 func (rs *RedisZSet) ZRANGE(setKey string, start, stop int64) ([]string, error) {
 	var results []string
--- a/docs/docs.go
+++ b/docs/docs.go
@ -23,6 +23,57 @@ const docTemplate = `{
    "host": "{{.Host}}",
    "basePath": "{{.BasePath}}",
    "paths": {
+        "/data-object/recommend": {
+            "get": {
+                "description": "根据用户输入的字符串，从 Redis 中查询可能的测量点或结构路径，并提供推荐列表。",
+                "consumes": [
+                    "application/json"
+                ],
+                "produces": [
+                    "application/json"
+                ],
+                "tags": [
+                    "DataObject Recommend"
+                ],
+                "summary": "测量点推荐（搜索框自动补全）",
+                "parameters": [
+                    {
+                        "type": "string",
+                        "example": "\"grid1\"",
+                        "description": "推荐关键词,例如 'grid1' 或 'grid1.'",
+                        "name": "input",
+                        "in": "query",
+                        "required": true
+                    }
+                ],
+                "responses": {
+                    "200": {
+                        "description": "返回推荐列表成功",
+                        "schema": {
+                            "allOf": [
+                                {
+                                    "$ref": "#/definitions/network.SuccessResponse"
+                                },
+                                {
+                                    "type": "object",
+                                    "properties": {
+                                        "payload": {
+                                            "$ref": "#/definitions/network.DataObjectRecommendPayload"
+                                        }
+                                    }
+                                }
+                            ]
+                        }
+                    },
+                    "400": {
+                        "description": "返回推荐列表失败",
+                        "schema": {
+                            "$ref": "#/definitions/network.FailureResponse"
+                        }
+                    }
+                }
+            }
+        },
        "/data/realtime": {
            "get": {
                "description": "根据用户输入的组件token,从 dataRT 服务中持续获取测点实时数据",
@ -87,57 +138,6 @@ const docTemplate = `{
                }
            }
        },
-        "/measurement/recommend": {
-            "get": {
-                "description": "根据用户输入的字符串，从 Redis 中查询可能的测量点或结构路径，并提供推荐列表。",
-                "consumes": [
-                    "application/json"
-                ],
-                "produces": [
-                    "application/json"
-                ],
-                "tags": [
-                    "Measurement Recommend"
-                ],
-                "summary": "测量点推荐（搜索框自动补全）",
-                "parameters": [
-                    {
-                        "type": "string",
-                        "example": "\"grid1\"",
-                        "description": "推荐关键词,例如 'grid1' 或 'grid1.'",
-                        "name": "input",
-                        "in": "query",
-                        "required": true
-                    }
-                ],
-                "responses": {
-                    "200": {
-                        "description": "返回推荐列表成功",
-                        "schema": {
-                            "allOf": [
-                                {
-                                    "$ref": "#/definitions/network.SuccessResponse"
-                                },
-                                {
-                                    "type": "object",
-                                    "properties": {
-                                        "payload": {
-                                            "$ref": "#/definitions/network.MeasurementRecommendPayload"
-                                        }
-                                    }
-                                }
-                            ]
-                        }
-                    },
-                    "400": {
-                        "description": "返回推荐列表失败",
-                        "schema": {
-                            "$ref": "#/definitions/network.FailureResponse"
-                        }
-                    }
-                }
-            }
-        },
        "/model/diagram_load/{page_id}": {
            "get": {
                "description": "load circuit diagram info by page id",
@ -487,23 +487,7 @@ const docTemplate = `{
                }
            }
        },
-        "network.FailureResponse": {
-            "type": "object",
-            "properties": {
-                "code": {
-                    "type": "integer",
-                    "example": 3000
-                },
-                "msg": {
-                    "type": "string",
-                    "example": "process completed with partial failures"
-                },
-                "payload": {
-                    "type": "object"
-                }
-            }
-        },
-        "network.MeasurementRecommendPayload": {
+        "network.DataObjectRecommendPayload": {
            "type": "object",
            "properties": {
                "input": {
@ -527,6 +511,22 @@ const docTemplate = `{
                }
            }
        },
+        "network.FailureResponse": {
+            "type": "object",
+            "properties": {
+                "code": {
+                    "type": "integer",
+                    "example": 3000
+                },
+                "msg": {
+                    "type": "string",
+                    "example": "process completed with partial failures"
+                },
+                "payload": {
+                    "type": "object"
+                }
+            }
+        },
        "network.RealTimeDataPayload": {
            "type": "object",
            "properties": {
--- a/docs/swagger.json
+++ b/docs/swagger.json
@ -17,6 +17,57 @@
    "host": "localhost:8080",
    "basePath": "/api/v1",
    "paths": {
+        "/data-object/recommend": {
+            "get": {
+                "description": "根据用户输入的字符串，从 Redis 中查询可能的测量点或结构路径，并提供推荐列表。",
+                "consumes": [
+                    "application/json"
+                ],
+                "produces": [
+                    "application/json"
+                ],
+                "tags": [
+                    "DataObject Recommend"
+                ],
+                "summary": "测量点推荐（搜索框自动补全）",
+                "parameters": [
+                    {
+                        "type": "string",
+                        "example": "\"grid1\"",
+                        "description": "推荐关键词,例如 'grid1' 或 'grid1.'",
+                        "name": "input",
+                        "in": "query",
+                        "required": true
+                    }
+                ],
+                "responses": {
+                    "200": {
+                        "description": "返回推荐列表成功",
+                        "schema": {
+                            "allOf": [
+                                {
+                                    "$ref": "#/definitions/network.SuccessResponse"
+                                },
+                                {
+                                    "type": "object",
+                                    "properties": {
+                                        "payload": {
+                                            "$ref": "#/definitions/network.DataObjectRecommendPayload"
+                                        }
+                                    }
+                                }
+                            ]
+                        }
+                    },
+                    "400": {
+                        "description": "返回推荐列表失败",
+                        "schema": {
+                            "$ref": "#/definitions/network.FailureResponse"
+                        }
+                    }
+                }
+            }
+        },
        "/data/realtime": {
            "get": {
                "description": "根据用户输入的组件token,从 dataRT 服务中持续获取测点实时数据",
@ -81,57 +132,6 @@
                }
            }
        },
-        "/measurement/recommend": {
-            "get": {
-                "description": "根据用户输入的字符串，从 Redis 中查询可能的测量点或结构路径，并提供推荐列表。",
-                "consumes": [
-                    "application/json"
-                ],
-                "produces": [
-                    "application/json"
-                ],
-                "tags": [
-                    "Measurement Recommend"
-                ],
-                "summary": "测量点推荐（搜索框自动补全）",
-                "parameters": [
-                    {
-                        "type": "string",
-                        "example": "\"grid1\"",
-                        "description": "推荐关键词,例如 'grid1' 或 'grid1.'",
-                        "name": "input",
-                        "in": "query",
-                        "required": true
-                    }
-                ],
-                "responses": {
-                    "200": {
-                        "description": "返回推荐列表成功",
-                        "schema": {
-                            "allOf": [
-                                {
-                                    "$ref": "#/definitions/network.SuccessResponse"
-                                },
-                                {
-                                    "type": "object",
-                                    "properties": {
-                                        "payload": {
-                                            "$ref": "#/definitions/network.MeasurementRecommendPayload"
-                                        }
-                                    }
-                                }
-                            ]
-                        }
-                    },
-                    "400": {
-                        "description": "返回推荐列表失败",
-                        "schema": {
-                            "$ref": "#/definitions/network.FailureResponse"
-                        }
-                    }
-                }
-            }
-        },
        "/model/diagram_load/{page_id}": {
            "get": {
                "description": "load circuit diagram info by page id",
@ -481,23 +481,7 @@
                }
            }
        },
-        "network.FailureResponse": {
-            "type": "object",
-            "properties": {
-                "code": {
-                    "type": "integer",
-                    "example": 3000
-                },
-                "msg": {
-                    "type": "string",
-                    "example": "process completed with partial failures"
-                },
-                "payload": {
-                    "type": "object"
-                }
-            }
-        },
-        "network.MeasurementRecommendPayload": {
+        "network.DataObjectRecommendPayload": {
            "type": "object",
            "properties": {
                "input": {
@ -521,6 +505,22 @@
                }
            }
        },
+        "network.FailureResponse": {
+            "type": "object",
+            "properties": {
+                "code": {
+                    "type": "integer",
+                    "example": 3000
+                },
+                "msg": {
+                    "type": "string",
+                    "example": "process completed with partial failures"
+                },
+                "payload": {
+                    "type": "object"
+                }
+            }
+        },
        "network.RealTimeDataPayload": {
            "type": "object",
            "properties": {
--- a/docs/swagger.yaml
+++ b/docs/swagger.yaml
@ -59,18 +59,7 @@ definitions:
        example: 3
        type: integer
    type: object
-  network.FailureResponse:
-    properties:
-      code:
-        example: 3000
-        type: integer
-      msg:
-        example: process completed with partial failures
-        type: string
-      payload:
-        type: object
-    type: object
-  network.MeasurementRecommendPayload:
+  network.DataObjectRecommendPayload:
    properties:
      input:
        example: transformfeeder1_220.
@ -87,6 +76,17 @@ definitions:
          type: string
        type: array
    type: object
+  network.FailureResponse:
+    properties:
+      code:
+        example: 3000
+        type: integer
+      msg:
+        example: process completed with partial failures
+        type: string
+      payload:
+        type: object
+    type: object
  network.RealTimeDataPayload:
    properties:
      sub_pos:
@ -169,6 +169,37 @@ info:
  title: ModelRT 实时模型服务 API 文档
  version: "1.0"
 paths:
+  /data-object/recommend:
+    get:
+      consumes:
+      - application/json
+      description: 根据用户输入的字符串，从 Redis 中查询可能的测量点或结构路径，并提供推荐列表。
+      parameters:
+      - description: 推荐关键词,例如 'grid1' 或 'grid1.'
+        example: '"grid1"'
+        in: query
+        name: input
+        required: true
+        type: string
+      produces:
+      - application/json
+      responses:
+        "200":
+          description: 返回推荐列表成功
+          schema:
+            allOf:
+            - $ref: '#/definitions/network.SuccessResponse'
+            - properties:
+                payload:
+                  $ref: '#/definitions/network.DataObjectRecommendPayload'
+              type: object
+        "400":
+          description: 返回推荐列表失败
+          schema:
+            $ref: '#/definitions/network.FailureResponse'
+      summary: 测量点推荐（搜索框自动补全）
+      tags:
+      - DataObject Recommend
  /data/realtime:
    get:
      consumes:
@ -209,37 +240,6 @@ paths:
      summary: 获取实时测点数据
      tags:
      - RealTime Component
-  /measurement/recommend:
-    get:
-      consumes:
-      - application/json
-      description: 根据用户输入的字符串，从 Redis 中查询可能的测量点或结构路径，并提供推荐列表。
-      parameters:
-      - description: 推荐关键词,例如 'grid1' 或 'grid1.'
-        example: '"grid1"'
-        in: query
-        name: input
-        required: true
-        type: string
-      produces:
-      - application/json
-      responses:
-        "200":
-          description: 返回推荐列表成功
-          schema:
-            allOf:
-            - $ref: '#/definitions/network.SuccessResponse'
-            - properties:
-                payload:
-                  $ref: '#/definitions/network.MeasurementRecommendPayload'
-              type: object
-        "400":
-          description: 返回推荐列表失败
-          schema:
-            $ref: '#/definitions/network.FailureResponse'
-      summary: 测量点推荐（搜索框自动补全）
-      tags:
-      - Measurement Recommend
  /model/diagram_load/{page_id}:
    get:
      consumes:
--- a/go.mod
+++ b/go.mod
@ -11,6 +11,7 @@ require (
 	github.com/gofrs/uuid v4.4.0+incompatible
 	github.com/gomodule/redigo v1.8.9
 	github.com/gorilla/websocket v1.5.3
+	github.com/jackc/pgx/v5 v5.5.5
 	github.com/json-iterator/go v1.1.12
 	github.com/natefinch/lumberjack v2.0.0+incompatible
 	github.com/panjf2000/ants/v2 v2.10.0
@ -62,7 +63,6 @@ require (
 	github.com/hashicorp/hcl v1.0.0 // indirect
 	github.com/jackc/pgpassfile v1.0.0 // indirect
 	github.com/jackc/pgservicefile v0.0.0-20221227161230-091c0ba34f0a // indirect
-	github.com/jackc/pgx/v5 v5.5.5 // indirect
 	github.com/jackc/puddle/v2 v2.2.1 // indirect
 	github.com/jinzhu/inflection v1.0.0 // indirect
 	github.com/jinzhu/now v1.1.5 // indirect
--- a/handler/async_task_create_handler.go
+++ b/handler/async_task_create_handler.go
@ -154,8 +154,7 @@ func validateBatchImportParams(params map[string]any) bool {
 func validateTestTaskParams(params map[string]any) bool {
 	// Test task has optional parameters, all are valid
 	// sleep_duration defaults to 60 seconds if not provided
-	// TODO Add more validation logic for test task parameters if needed
-	fmt.Println(params)
+	fmt.Println("Test task parameters:", params)
 	return true
 }

--- a/handler/component_attribute_query.go
+++ b/handler/component_attribute_query.go
@ -8,8 +8,6 @@ import (
 	"slices"
 	"strings"

-	"github.com/gofrs/uuid"
-
 	"modelRT/common/errcode"
 	"modelRT/constants"
 	"modelRT/database"
@ -18,6 +16,7 @@ import (
 	"modelRT/orm"

 	"github.com/gin-gonic/gin"
+	"github.com/gofrs/uuid"
 )

 // ComponentAttributeQueryHandler define circuit diagram component attribute value query process API
@ -55,7 +54,15 @@ func ComponentAttributeQueryHandler(c *gin.Context) {
 	dbQueryMap := make(map[string][]cacheQueryItem)
 	var secondaryQueryCount int
 	for hSetKey, items := range cacheQueryMap {
-		hset := diagram.NewRedisHash(ctx, hSetKey, 5000, false)
+		hset, err := diagram.NewRedisHash(ctx, hSetKey, 5000, false)
+		if err != nil {
+			logger.Warn(ctx, "create redis hash failed", "key", hSetKey, "error", err)
+			for _, item := range items {
+				dbQueryMap[item.attributeCompTag] = append(dbQueryMap[item.attributeCompTag], item)
+				secondaryQueryCount++
+			}
+			continue
+		}
 		cacheData, err := hset.HGetAll()
 		if err != nil {
 			logger.Warn(ctx, "redis hgetall failed", "key", hSetKey, "err", err)
@ -186,7 +193,11 @@ func fillRemainingErrors(results map[string]queryResult, tokens []string, err *e
 }

 func backfillRedis(ctx context.Context, hSetKey string, items []cacheQueryItem) {
-	hset := diagram.NewRedisHash(ctx, hSetKey, 5000, false)
+	hset, err := diagram.NewRedisHash(ctx, hSetKey, 5000, false)
+	if err != nil {
+		logger.Error(ctx, "create redis hash for async backfill failed", "hash_key", hSetKey, "error", err)
+		return
+	}
 	fields := make(map[string]any, len(items))
 	for _, item := range items {
 		if item.attributeVal != "" {
--- a/handler/component_attribute_update.go
+++ b/handler/component_attribute_update.go
@ -140,7 +140,14 @@ func ComponentAttributeUpdateHandler(c *gin.Context) {
 	}

 	for key, items := range redisUpdateMap {
-		hset := diagram.NewRedisHash(ctx, key, 5000, false)
+		hset, err := diagram.NewRedisHash(ctx, key, 5000, false)
+		if err != nil {
+			logger.Error(ctx, "create redis hash failed", "hash_key", key, "error", err)
+			for _, item := range items {
+				updateResults[item.token] = errcode.ErrCacheSyncWarn.WithCause(err)
+			}
+			continue
+		}

 		fields := make(map[string]any, len(items))
 		for _, item := range items {
--- a/handler/data_object_attribute_query.go
+++ b/handler/data_object_attribute_query.go
@ -0,0 +1,337 @@
+// Package handler provides HTTP handlers for various endpoints.
+package handler
+
+import (
+	"context"
+	"errors"
+	"fmt"
+	"strings"
+
+	"modelRT/common"
+	"modelRT/common/errcode"
+	"modelRT/constants"
+	"modelRT/database"
+	"modelRT/diagram"
+	"modelRT/logger"
+	"modelRT/model"
+	"modelRT/orm"
+
+	"github.com/gin-gonic/gin"
+)
+
+// DataObjectAttributeQueryHandler define data object attribute value query process API
+func DataObjectAttributeQueryHandler(c *gin.Context) {
+	ctx := c.Request.Context()
+	pgClient := database.GetPostgresDBClient()
+
+	token, field, err := parseDataObjectAttributeQuery(c)
+	if err != nil {
+		logger.Error(ctx, "query token from query parameters failed", "error", err, "url", c.Request.RequestURI)
+		renderRespFailure(c, constants.RespCodeInvalidParams, err.Error(), nil)
+		return
+	}
+
+	dataObjectType, err := model.ClassifyDataObjectToken(token)
+	if err != nil {
+		logger.Error(ctx, "classify data object token failed", "error", err, "url", c.Request.RequestURI)
+		renderRespFailure(c, constants.RespCodeInvalidParams, err.Error(), nil)
+		return
+	}
+
+	if err := validateDataObjectField(dataObjectType, field); err != nil {
+		logger.Warn(ctx, "validate data object field failed", "token", token, "field", field, "error", err)
+		renderRespFailure(c, constants.RespCodeInvalidParams, err.Error(), nil)
+		return
+	}
+
+	var parameter *database.ParameterDataObject
+	var measurement *orm.Measurement
+	var measurementComponent *orm.Component
+	switch dataObjectType {
+	case constants.DataObjectTypeParameter:
+		// 参量支持两种形式token4.token5.token6.token7与token1.token2.token3.token4.token5.token6.token7
+		parameter, err = database.QueryParameterByDataObjectToken(ctx, pgClient, token)
+		if err != nil {
+			if errors.Is(err, common.ErrInvalidParameterToken) ||
+				errors.Is(err, common.ErrParameterTokenNotFound) ||
+				errors.Is(err, common.ErrAmbiguousParameterToken) {
+				logger.Warn(ctx, "validate parameter token failed", "token", token, "error", err)
+				renderRespFailure(c, constants.RespCodeInvalidParams, err.Error(), nil)
+				return
+			}
+
+			logger.Error(ctx, "query parameter token from postgres failed", "token", token, "error", err)
+			renderRespFailure(c, constants.RespCodeServerError, "validate parameter token failed", nil)
+			return
+		}
+	case constants.DataObjectTypeMeasurement:
+		// 量测支持token1.token2.token3.token4.token5.token6.token7、token4.token5.token6.token7、token4.token7
+		measurement, measurementComponent, err = database.QueryMeasurementByDataObjectToken(ctx, pgClient, token)
+		if err != nil {
+			if errors.Is(err, common.ErrInvalidMeasurementToken) ||
+				errors.Is(err, common.ErrMeasurementTokenNotFound) ||
+				errors.Is(err, common.ErrAmbiguousMeasurementToken) {
+				logger.Warn(ctx, "validate measurement token failed", "token", token, "error", err)
+				renderRespFailure(c, constants.RespCodeInvalidParams, err.Error(), nil)
+				return
+			}
+
+			logger.Error(ctx, "query measurement token from postgres failed", "token", token, "error", err)
+			renderRespFailure(c, constants.RespCodeServerError, "validate measurement token failed", nil)
+			return
+		}
+	}
+
+	switch dataObjectType {
+	case constants.DataObjectTypeParameter:
+		value, err := buildParameterAttributeValue(
+			ctx,
+			field,
+			parameter,
+			func(ctx context.Context, parameter *database.ParameterDataObject) (any, error) {
+				return database.QueryParameterDataObjectValue(ctx, pgClient, parameter)
+			},
+			func(ctx context.Context, attributeName string) (string, error) {
+				return database.QueryParameterAttributeDescription(ctx, pgClient, attributeName)
+			},
+		)
+		if err != nil {
+			if errors.Is(err, common.ErrUnsupportedParameterField) {
+				logger.Warn(ctx, "query unsupported parameter field", "token", token, "field", field, "error", err)
+				renderRespFailure(c, constants.RespCodeInvalidParams, err.Error(), nil)
+				return
+			}
+
+			logger.Error(ctx, "build parameter attribute value failed", "token", token, "field", field, "error", err)
+			renderRespFailure(c, constants.RespCodeServerError, "query parameter attribute failed", nil)
+			return
+		}
+
+		result := dataObjectAttributeQueryResult{
+			Token: token,
+			Field: field,
+			Code:  errcode.ErrProcessSuccess.Code(),
+			Msg:   errcode.ErrProcessSuccess.Msg(),
+			Value: value,
+		}
+		renderRespSuccess(c, constants.RespCodeSuccess, "query parameter attribute success", map[string]any{
+			"attributes": []dataObjectAttributeQueryResult{result},
+		})
+	case constants.DataObjectTypeMeasurement:
+		value, err := buildMeasurementAttributeValue(
+			ctx,
+			field,
+			measurement,
+			measurementComponent,
+			queryMeasurementRealtimeValue,
+		)
+		if err != nil {
+			if errors.Is(err, common.ErrUnsupportedMeasurementField) {
+				logger.Warn(ctx, "query unsupported measurement field", "token", token, "field", field, "error", err)
+				renderRespFailure(c, constants.RespCodeInvalidParams, err.Error(), nil)
+				return
+			}
+
+			logger.Error(ctx, "build measurement attribute value failed", "token", token, "field", field, "error", err)
+			renderRespFailure(c, constants.RespCodeServerError, "query measurement attribute failed", nil)
+			return
+		}
+
+		result := dataObjectAttributeQueryResult{
+			Token: token,
+			Field: field,
+			Code:  errcode.ErrProcessSuccess.Code(),
+			Msg:   errcode.ErrProcessSuccess.Msg(),
+			Value: value,
+		}
+		renderRespSuccess(c, constants.RespCodeSuccess, "query measurement attribute success", map[string]any{
+			"attributes": []dataObjectAttributeQueryResult{result},
+		})
+	default:
+		renderRespFailure(c, constants.RespCodeInvalidParams, "invalid data object type", nil)
+	}
+}
+
+func parseDataObjectAttributeQuery(c *gin.Context) (string, string, error) {
+	token := c.Query("token")
+	if token == "" {
+		return "", "", fmt.Errorf("token is missing from query parameters")
+	}
+
+	field := strings.ToLower(c.Query("field"))
+	if field == "" {
+		field = "value"
+	}
+	return token, field, nil
+}
+
+type measurementValueLoader func(context.Context, orm.JSONMap) (any, error)
+
+type parameterValueLoader func(context.Context, *database.ParameterDataObject) (any, error)
+
+type parameterDescriptionLoader func(context.Context, string) (string, error)
+
+var measurementDataObjectFields = map[string]struct{}{
+	"value":       {},
+	"mode":        {},
+	"meta":        {},
+	"type":        {},
+	"name":        {},
+	"description": {},
+	"id":          {},
+	"size":        {},
+	"data_source": {},
+	"event_plan":  {},
+	"binding":     {},
+}
+
+var parameterDataObjectFields = map[string]struct{}{
+	"value":       {},
+	"name":        {},
+	"meta":        {},
+	"type":        {},
+	"description": {},
+	"id":          {},
+}
+
+type dataObjectAttributeQueryResult struct {
+	Token string `json:"token"`
+	Field string `json:"field"`
+	Code  int    `json:"code"`
+	Msg   string `json:"msg"`
+	Value any    `json:"value"`
+}
+
+func validateDataObjectField(dataObjectType constants.DataObjectType, field string) error {
+	field = strings.ToLower(field)
+	switch dataObjectType {
+	case constants.DataObjectTypeMeasurement:
+		if _, ok := measurementDataObjectFields[field]; ok {
+			return nil
+		}
+		return fmt.Errorf("%w: %s", common.ErrUnsupportedMeasurementField, field)
+	case constants.DataObjectTypeParameter:
+		if _, ok := parameterDataObjectFields[field]; ok {
+			return nil
+		}
+		return fmt.Errorf("%w: %s", common.ErrUnsupportedParameterField, field)
+	default:
+		return fmt.Errorf("invalid data object type %q", dataObjectType)
+	}
+}
+
+func buildParameterAttributeValue(
+	ctx context.Context,
+	field string,
+	parameter *database.ParameterDataObject,
+	loadValue parameterValueLoader,
+	loadDescription parameterDescriptionLoader,
+) (any, error) {
+	if parameter == nil {
+		return nil, fmt.Errorf("parameter data object is nil")
+	}
+
+	component := parameter.Component
+	switch field {
+	case "value":
+		if loadValue == nil {
+			return nil, fmt.Errorf("parameter value loader is nil")
+		}
+		return loadValue(ctx, parameter)
+	case "meta":
+		return "PARAM", nil
+	case "type":
+		return parameter.AttributeType, nil
+	case "name":
+		return strings.Join([]string{
+			component.NSPath,
+			component.Tag,
+			parameter.AttributeGroup,
+			parameter.AttributeName,
+		}, "."), nil
+	case "description":
+		if loadDescription == nil {
+			return nil, fmt.Errorf("parameter description loader is nil")
+		}
+		return loadDescription(ctx, parameter.AttributeName)
+	case "id":
+		return strings.Join([]string{
+			component.GridName,
+			component.ZoneName,
+			component.StationName,
+			component.NSPath,
+			component.Tag,
+			parameter.AttributeGroup,
+			parameter.AttributeName,
+		}, "."), nil
+	default:
+		return nil, fmt.Errorf("%w: %s", common.ErrUnsupportedParameterField, field)
+	}
+}
+
+func buildMeasurementAttributeValue(
+	ctx context.Context,
+	field string,
+	measurement *orm.Measurement,
+	component *orm.Component,
+	loadValue measurementValueLoader,
+) (any, error) {
+	if measurement == nil {
+		return nil, fmt.Errorf("measurement is nil")
+	}
+	if component == nil {
+		return nil, fmt.Errorf("measurement component is nil")
+	}
+
+	switch field {
+	case "value":
+		if loadValue == nil {
+			return nil, fmt.Errorf("measurement value loader is nil")
+		}
+		return loadValue(ctx, measurement.DataSource)
+	case "mode":
+		return measurement.Mode, nil
+	case "meta":
+		return "MEASUREMENT", nil
+	case "type":
+		return model.MeasurementTypeFromDataSource(measurement.DataSource)
+	case "name":
+		// The resolved measurement and component prove that token4.token7 exists.
+		return component.NSPath + "." + measurement.Tag, nil
+	case "description":
+		return measurement.Name, nil
+	case "id":
+		return strings.Join([]string{
+			component.GridName,
+			component.ZoneName,
+			component.StationName,
+			component.NSPath,
+			component.Tag,
+			"bay",
+			measurement.Tag,
+		}, "."), nil
+	case "size":
+		return measurement.Size, nil
+	case "data_source":
+		return measurement.DataSource, nil
+	case "event_plan":
+		return measurement.EventPlan, nil
+	case "binding":
+		return measurement.Binding, nil
+	default:
+		return nil, fmt.Errorf("%w: %s", common.ErrUnsupportedMeasurementField, field)
+	}
+}
+
+func queryMeasurementRealtimeValue(ctx context.Context, dataSource orm.JSONMap) (any, error) {
+	queryKey, err := model.GenerateMeasureIdentifier(dataSource)
+	if err != nil {
+		return nil, fmt.Errorf("generate measurement redis key: %w", err)
+	}
+
+	value, err := diagram.NewRedisClient().QueryLatestMeasurementValue(ctx, queryKey)
+	if err != nil {
+		return nil, fmt.Errorf("query real-time measurement value by key %q: %w", queryKey, err)
+	}
+	return value, nil
+}
--- a/handler/data_object_attribute_query_test.go
+++ b/handler/data_object_attribute_query_test.go
@ -0,0 +1,276 @@
+package handler
+
+import (
+	"context"
+	"net/http"
+	"net/http/httptest"
+	"testing"
+
+	"modelRT/common"
+	"modelRT/constants"
+	"modelRT/database"
+	"modelRT/orm"
+
+	"github.com/gin-gonic/gin"
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
+)
+
+func TestParseDataObjectAttributeQuery(t *testing.T) {
+	const token = "nspath.component.bay.measurement"
+
+	tests := []struct {
+		name      string
+		target    string
+		wantToken string
+		wantField string
+		wantErr   string
+	}{
+		{
+			name:      "reads token and field from query parameters",
+			target:    "/data-object/attribute?token=" + token + "&field=NAME",
+			wantToken: token,
+			wantField: "name",
+		},
+		{
+			name:      "defaults missing field to value",
+			target:    "/data-object/attribute?token=" + token,
+			wantToken: token,
+			wantField: "value",
+		},
+		{
+			name:      "defaults empty field to value",
+			target:    "/data-object/attribute?token=" + token + "&field=",
+			wantToken: token,
+			wantField: "value",
+		},
+		{
+			name:    "rejects missing token",
+			target:  "/data-object/attribute?field=value",
+			wantErr: "token is missing from query parameters",
+		},
+		{
+			name:    "rejects empty token",
+			target:  "/data-object/attribute?token=&field=value",
+			wantErr: "token is missing from query parameters",
+		},
+		{
+			name:    "does not read legacy path parameters",
+			target:  "/data-object/attribute/" + token + "/value",
+			wantErr: "token is missing from query parameters",
+		},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			ctx, _ := gin.CreateTestContext(httptest.NewRecorder())
+			ctx.Request = httptest.NewRequest(http.MethodGet, tt.target, nil)
+
+			token, field, err := parseDataObjectAttributeQuery(ctx)
+			if tt.wantErr != "" {
+				require.EqualError(t, err, tt.wantErr)
+				assert.Empty(t, token)
+				assert.Empty(t, field)
+				return
+			}
+			require.NoError(t, err)
+			assert.Equal(t, tt.wantToken, token)
+			assert.Equal(t, tt.wantField, field)
+		})
+	}
+}
+
+func TestValidateDataObjectField(t *testing.T) {
+	tests := []struct {
+		name           string
+		token          string
+		dataObjectType constants.DataObjectType
+		field          string
+		wantErr        error
+	}{
+		{name: "bay value", token: "nspath.component.bay.measurement", dataObjectType: constants.DataObjectTypeMeasurement, field: "value"},
+		{name: "bay name", token: "nspath.component.bay.measurement", dataObjectType: constants.DataObjectTypeMeasurement, field: "name"},
+		{name: "bay binding", token: "nspath.component.bay.measurement", dataObjectType: constants.DataObjectTypeMeasurement, field: "binding"},
+		{name: "bay field is case insensitive", token: "nspath.component.bay.measurement", dataObjectType: constants.DataObjectTypeMeasurement, field: "DATA_SOURCE"},
+		{name: "bay unsupported", token: "nspath.component.bay.measurement", dataObjectType: constants.DataObjectTypeMeasurement, field: "unknown", wantErr: common.ErrUnsupportedMeasurementField},
+		{name: "parameter value", token: "nspath.component.rated.attribute", dataObjectType: constants.DataObjectTypeParameter, field: "value"},
+		{name: "parameter name", token: "nspath.component.rated.attribute", dataObjectType: constants.DataObjectTypeParameter, field: "name"},
+		{name: "parameter rejects mode", token: "nspath.component.rated.attribute", dataObjectType: constants.DataObjectTypeParameter, field: "mode", wantErr: common.ErrUnsupportedParameterField},
+		{name: "component name", token: "nspath.component.component.name", dataObjectType: constants.DataObjectTypeParameter, field: "name"},
+		{name: "component rejects mode", token: "nspath.component.component.name", dataObjectType: constants.DataObjectTypeParameter, field: "mode", wantErr: common.ErrUnsupportedParameterField},
+		{name: "parameter rejects size", token: "nspath.component.rated.attribute", dataObjectType: constants.DataObjectTypeParameter, field: "size", wantErr: common.ErrUnsupportedParameterField},
+		{name: "invalid type", token: "token", dataObjectType: constants.DataObjectType("unknown"), field: "value", wantErr: assert.AnError},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			err := validateDataObjectField(tt.dataObjectType, tt.field)
+			if tt.wantErr == nil {
+				require.NoError(t, err)
+				return
+			}
+			require.Error(t, err)
+			if tt.wantErr != assert.AnError {
+				assert.ErrorIs(t, err, tt.wantErr)
+			}
+		})
+	}
+}
+
+func TestBuildParameterAttributeValue(t *testing.T) {
+	parameter := &database.ParameterDataObject{
+		Component: orm.Component{
+			GridName:    "grid000",
+			ZoneName:    "zone000",
+			StationName: "station000",
+			NSPath:      "110kV_TV",
+			Tag:         "cable_22",
+		},
+		AttributeGroup: "rated",
+		AttributeName:  "rated_voltage",
+		AttributeType:  "DOUBLE PRECISION",
+	}
+	loader := func(_ context.Context, actual *database.ParameterDataObject) (any, error) {
+		assert.Same(t, parameter, actual)
+		return float64(220), nil
+	}
+	descriptionLoader := func(_ context.Context, attributeName string) (string, error) {
+		assert.Equal(t, "rated_voltage", attributeName)
+		return "额定电压", nil
+	}
+
+	tests := []struct {
+		field    string
+		expected any
+	}{
+		{field: "value", expected: float64(220)},
+		{field: "meta", expected: "PARAM"},
+		{field: "type", expected: "DOUBLE PRECISION"},
+		{field: "name", expected: "110kV_TV.cable_22.rated.rated_voltage"},
+		{field: "description", expected: "额定电压"},
+		{field: "id", expected: "grid000.zone000.station000.110kV_TV.cable_22.rated.rated_voltage"},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.field, func(t *testing.T) {
+			actual, err := buildParameterAttributeValue(
+				context.Background(),
+				tt.field,
+				parameter,
+				loader,
+				descriptionLoader,
+			)
+			require.NoError(t, err)
+			assert.Equal(t, tt.expected, actual)
+		})
+	}
+}
+
+func TestBuildParameterAttributeValueRejectsUnsupportedField(t *testing.T) {
+	_, err := buildParameterAttributeValue(
+		context.Background(),
+		"unknown",
+		&database.ParameterDataObject{},
+		nil,
+		nil,
+	)
+	require.Error(t, err)
+	assert.ErrorIs(t, err, common.ErrUnsupportedParameterField)
+}
+
+func TestBuildMeasurementAttributeValue(t *testing.T) {
+	dataSource := orm.JSONMap{
+		"type": float64(1),
+		"io_address": map[string]any{
+			"channel": "tm1p",
+		},
+	}
+	eventPlan := orm.JSONMap{"enabled": true}
+	binding := orm.JSONMap{"ct": map[string]any{"ratio": float64(2)}}
+	measurement := &orm.Measurement{
+		Tag:        "IA_rms",
+		Name:       "A相电流",
+		Mode:       1,
+		Size:       10,
+		DataSource: dataSource,
+		EventPlan:  eventPlan,
+		Binding:    binding,
+	}
+	component := &orm.Component{
+		GridName:    "grid000",
+		ZoneName:    "zone000",
+		StationName: "station000",
+		NSPath:      "110kV_TV",
+		Tag:         "cable_22",
+	}
+
+	loader := func(_ context.Context, source orm.JSONMap) (any, error) {
+		assert.Equal(t, dataSource, source)
+		return float64(220), nil
+	}
+
+	tests := []struct {
+		field    string
+		expected any
+	}{
+		{field: "value", expected: float64(220)},
+		{field: "mode", expected: int16(1)},
+		{field: "meta", expected: "MEASUREMENT"},
+		{field: "type", expected: "TM"},
+		{field: "name", expected: "110kV_TV.IA_rms"},
+		{field: "description", expected: "A相电流"},
+		{field: "id", expected: "grid000.zone000.station000.110kV_TV.cable_22.bay.IA_rms"},
+		{field: "size", expected: 10},
+		{field: "data_source", expected: dataSource},
+		{field: "event_plan", expected: eventPlan},
+		{field: "binding", expected: binding},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.field, func(t *testing.T) {
+			actual, err := buildMeasurementAttributeValue(context.Background(), tt.field, measurement, component, loader)
+			require.NoError(t, err)
+			assert.Equal(t, tt.expected, actual)
+		})
+	}
+}
+
+func TestBuildMeasurementAttributeValueRejectsUnsupportedField(t *testing.T) {
+	_, err := buildMeasurementAttributeValue(
+		context.Background(),
+		"unknown",
+		&orm.Measurement{},
+		&orm.Component{},
+		nil,
+	)
+	require.Error(t, err)
+	assert.ErrorIs(t, err, common.ErrUnsupportedMeasurementField)
+}
+
+func TestBuildMeasurementAttributeValueMode(t *testing.T) {
+	component := &orm.Component{}
+	tests := []struct {
+		name     string
+		mode     int16
+		expected int16
+	}{
+		{name: "collected value", mode: 1, expected: 1},
+		{name: "manually assigned value", mode: 0, expected: 0},
+		{name: "other positive mode", mode: 2, expected: 2},
+		{name: "negative mode", mode: -1, expected: -1},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			actual, err := buildMeasurementAttributeValue(
+				context.Background(),
+				"mode",
+				&orm.Measurement{Mode: tt.mode},
+				component,
+				nil,
+			)
+			require.NoError(t, err)
+			assert.Equal(t, tt.expected, actual)
+		})
+	}
+}
--- a/handler/data_object_attribute_update.go
+++ b/handler/data_object_attribute_update.go
@ -0,0 +1,425 @@
+// Package handler provides HTTP handlers for various endpoints.
+package handler
+
+import (
+	"bytes"
+	"context"
+	"encoding/json"
+	"errors"
+	"fmt"
+	"strconv"
+	"strings"
+	"time"
+
+	"modelRT/common"
+	"modelRT/common/errcode"
+	"modelRT/constants"
+	"modelRT/database"
+	"modelRT/diagram"
+	"modelRT/logger"
+	"modelRT/model"
+	"modelRT/orm"
+
+	"github.com/gin-gonic/gin"
+	"gorm.io/gorm"
+)
+
+type dataObjectAttributeUpdateRequest struct {
+	Token string          `json:"token"`
+	Field string          `json:"field"`
+	Value json.RawMessage `json:"value"`
+	Data  json.RawMessage `json:"data,omitempty"`
+}
+
+// DataObjectAttributeUpdateHandler updates the writable field of one data object.
+func DataObjectAttributeUpdateHandler(c *gin.Context) {
+	ctx := c.Request.Context()
+	var request dataObjectAttributeUpdateRequest
+	if err := c.ShouldBindJSON(&request); err != nil {
+		logger.Error(ctx, "unmarshal data-object update request failed", "error", err)
+		renderRespFailure(c, constants.RespCodeInvalidParams, err.Error(), nil)
+		return
+	}
+
+	dataObjectType, field, value, err := validateDataObjectAttributeUpdate(request)
+	if err != nil {
+		logger.Warn(ctx, "validate data-object update request failed", "token", request.Token, "field", request.Field, "error", err)
+		renderRespFailure(c, constants.RespCodeInvalidParams, err.Error(), nil)
+		return
+	}
+
+	tx := database.GetPostgresDBClient().WithContext(ctx).Begin()
+	if tx.Error != nil {
+		logger.Error(ctx, "begin data-object update transaction failed", "error", tx.Error)
+		renderRespFailure(c, constants.RespCodeServerError, "begin postgres transaction failed", nil)
+		return
+	}
+	transactionCompleted := false
+	defer func() {
+		if !transactionCompleted {
+			_ = tx.Rollback().Error
+		}
+	}()
+
+	message := "data-object attribute update success"
+	var measurementResult measurementUpdateResult
+	switch dataObjectType {
+	case constants.DataObjectTypeParameter:
+		parameter, queryErr := database.QueryParameterByDataObjectToken(ctx, tx, request.Token)
+		if queryErr == nil {
+			queryErr = database.UpdateParameterDataObjectValue(ctx, tx, parameter, value)
+		}
+		err = queryErr
+	case constants.DataObjectTypeMeasurement:
+		measurementResult, err = updateMeasurementDataObject(ctx, tx, request.Token, field, value, request.Data, measurementUpdateDependencies{
+			writeManualValueFunc:  writeMeasurementManualValue,
+			updateDataRTFunc:      callRealTimeDataWriteStopInterface,
+			startDataRTFunc:       callRealTimeDataWriteStartInterface,
+			replaceRedisValueFunc: replaceMeasurementRedisValue,
+		})
+		message = measurementResult.message
+	default:
+		err = fmt.Errorf("unsupported data object type %q", dataObjectType)
+	}
+
+	if err != nil {
+		_ = tx.Rollback().Error
+		if measurementResult.recordFailure {
+			if logErr := database.AppendMeasurementValueOperation(ctx, database.GetPostgresDBClient(), measurementResult.measurementID, 1, measurementResult.value, time.Now().UTC()); logErr != nil {
+				logger.Error(ctx, "append failed measurement value operation failed", "measurement_id", measurementResult.measurementID, "error", logErr)
+			}
+		}
+		logger.Warn(ctx, "update data-object attribute failed", "token", request.Token, "field", field, "error", err)
+		if isInvalidDataObjectUpdateError(err) {
+			renderRespFailure(c, constants.RespCodeInvalidParams, err.Error(), nil)
+			return
+		}
+		renderRespFailure(c, constants.RespCodeFailed, err.Error(), nil)
+		return
+	}
+
+	if err := tx.Commit().Error; err != nil {
+		logger.Error(ctx, "commit data-object update transaction failed", "token", request.Token, "field", field, "error", err)
+		renderRespFailure(c, constants.RespCodeServerError, "transaction commit failed", nil)
+		return
+	}
+	transactionCompleted = true
+
+	renderRespSuccess(c, constants.RespCodeSuccess, message, map[string]any{
+		"token": request.Token,
+		"field": field,
+		"value": value,
+	})
+}
+
+func validateDataObjectAttributeUpdate(request dataObjectAttributeUpdateRequest) (constants.DataObjectType, string, any, error) {
+	if request.Token == "" {
+		return "", "", nil, fmt.Errorf("token is required")
+	}
+	if len(bytes.TrimSpace(request.Value)) == 0 || bytes.Equal(bytes.TrimSpace(request.Value), []byte("null")) {
+		return "", "", nil, fmt.Errorf("value is required")
+	}
+
+	field := strings.ToLower(strings.TrimSpace(request.Field))
+	if field == "" {
+		field = "value"
+	}
+
+	dataObjectType, err := model.ClassifyDataObjectToken(request.Token)
+	if err != nil {
+		return "", "", nil, err
+	}
+
+	switch dataObjectType {
+	case constants.DataObjectTypeParameter:
+		parts := strings.Split(request.Token, ".")
+		attributeGroup := parts[len(parts)-2]
+		if !isWritableParameterAttributeGroup(attributeGroup) {
+			return "", "", nil, fmt.Errorf("parameter updates do not support token6=%s", attributeGroup)
+		}
+		if field != "value" {
+			return "", "", nil, fmt.Errorf("parameter data objects only support updating field value")
+		}
+		value, err := decodeDataObjectUpdateValue(request.Value)
+		return dataObjectType, field, value, err
+	case constants.DataObjectTypeMeasurement:
+		parts := strings.Split(request.Token, ".")
+		if len(parts) != 2 && parts[len(parts)-2] != "bay" {
+			return "", "", nil, fmt.Errorf("measurement updates require token4.token7 or token6=bay")
+		}
+		switch field {
+		case "value":
+			value, err := parseMeasurementUpdateValue(request.Value)
+			return dataObjectType, field, value, err
+		case "mode":
+			value, err := parseMeasurementUpdateMode(request.Value)
+			return dataObjectType, field, value, err
+		default:
+			return "", "", nil, fmt.Errorf("measurement data objects only support updating fields value and mode")
+		}
+	default:
+		return "", "", nil, fmt.Errorf("unsupported data object type %q", dataObjectType)
+	}
+}
+
+func isWritableParameterAttributeGroup(group string) bool {
+	switch group {
+	case "rated", "setup", "model", "stable", "craft", "integrity", "behavior", "base_extend":
+		return true
+	default:
+		return false
+	}
+}
+
+func decodeDataObjectUpdateValue(raw json.RawMessage) (any, error) {
+	decoder := json.NewDecoder(bytes.NewReader(raw))
+	decoder.UseNumber()
+	var value any
+	if err := decoder.Decode(&value); err != nil {
+		return nil, fmt.Errorf("decode update value: %w", err)
+	}
+	if number, ok := value.(json.Number); ok {
+		if integer, err := number.Int64(); err == nil {
+			return integer, nil
+		}
+		decimal, err := number.Float64()
+		if err != nil {
+			return nil, fmt.Errorf("invalid numeric update value %q: %w", number, err)
+		}
+		return decimal, nil
+	}
+	return value, nil
+}
+
+func parseMeasurementUpdateValue(raw json.RawMessage) (float64, error) {
+	var number float64
+	if err := json.Unmarshal(raw, &number); err == nil {
+		return number, nil
+	}
+
+	var text string
+	if err := json.Unmarshal(raw, &text); err != nil {
+		return 0, fmt.Errorf("measurement value must be a number or numeric string")
+	}
+	number, err := strconv.ParseFloat(text, 64)
+	if err != nil {
+		return 0, fmt.Errorf("measurement value %q is not numeric: %w", text, err)
+	}
+	return number, nil
+}
+
+func parseMeasurementUpdateMode(raw json.RawMessage) (int16, error) {
+	var mode int16
+	if err := json.Unmarshal(raw, &mode); err != nil {
+		return 0, fmt.Errorf("measurement mode must be 0 (manual) or 1 (automatic)")
+	}
+	if mode != constants.MeasurementModeManual && mode != constants.MeasurementModeAutomatic {
+		return 0, fmt.Errorf("measurement mode must be 0 (manual) or 1 (automatic)")
+	}
+	return mode, nil
+}
+
+type measurementManualValueWriter func(context.Context, *orm.Measurement, float64) error
+
+type measurementDataRTUpdater func(context.Context, orm.JSONMap, *float64) error
+
+type measurementRedisValueReplacer func(context.Context, *orm.Measurement, float64) error
+
+type measurementUpdateDependencies struct {
+	writeManualValueFunc  measurementManualValueWriter
+	updateDataRTFunc      measurementDataRTUpdater
+	startDataRTFunc       measurementDataRTUpdater
+	replaceRedisValueFunc measurementRedisValueReplacer
+}
+
+type measurementUpdateResult struct {
+	message       string
+	measurementID int64
+	value         float64
+	recordFailure bool
+}
+
+func updateMeasurementDataObject(
+	ctx context.Context,
+	tx *gorm.DB,
+	token, field string,
+	value any,
+	modeData json.RawMessage,
+	dependencies measurementUpdateDependencies,
+) (measurementUpdateResult, error) {
+	measurement, _, err := database.QueryMeasurementByDataObjectToken(ctx, tx, token)
+	if err != nil {
+		return measurementUpdateResult{}, err
+	}
+
+	lockedMeasurement, err := database.QueryMeasurementByIDForUpdate(ctx, tx, measurement.ID)
+	if err != nil {
+		return measurementUpdateResult{}, fmt.Errorf("lock measurement %d for update: %w", measurement.ID, err)
+	}
+
+	switch field {
+	case "mode":
+		mode, ok := value.(int16)
+		if !ok {
+			return measurementUpdateResult{}, fmt.Errorf("measurement mode has invalid type %T", value)
+		}
+		currentMode, err := measurementModeIsAutomatic(lockedMeasurement.Mode)
+		if err != nil {
+			return measurementUpdateResult{}, err
+		}
+		targetAutomatic := mode == constants.MeasurementModeAutomatic
+		if currentMode == targetAutomatic {
+			return measurementUpdateResult{message: fmt.Sprintf("measurement is already in %s mode", measurementModeName(mode))}, nil
+		}
+		var manualValue *float64
+		if currentMode && mode == constants.MeasurementModeManual {
+			manualValue, err = parseOptionalMeasurementModeData(modeData)
+			if err != nil {
+				return measurementUpdateResult{}, err
+			}
+		}
+		if err := database.UpdateMeasurementModeWithOperation(ctx, tx, lockedMeasurement.ID, mode, time.Now().UTC()); err != nil {
+			return measurementUpdateResult{}, err
+		}
+		if currentMode && mode == constants.MeasurementModeManual {
+			if dependencies.updateDataRTFunc == nil {
+				return measurementUpdateResult{}, fmt.Errorf("measurement dataRT updater is nil")
+			}
+			if err := dependencies.updateDataRTFunc(ctx, lockedMeasurement.DataSource, nil); err != nil {
+				return measurementUpdateResult{}, fmt.Errorf("stop automatic measurement write to dataRT: %w", err)
+			}
+			if manualValue != nil {
+				if dependencies.replaceRedisValueFunc == nil {
+					return measurementUpdateResult{}, fmt.Errorf("measurement redis value replacer is nil")
+				}
+				if err := dependencies.replaceRedisValueFunc(ctx, &lockedMeasurement, *manualValue); err != nil {
+					return measurementUpdateResult{}, fmt.Errorf("replace measurement redis value: %w", err)
+				}
+			}
+		}
+		if !currentMode && mode == constants.MeasurementModeAutomatic {
+			if dependencies.startDataRTFunc == nil {
+				return measurementUpdateResult{}, fmt.Errorf("measurement dataRT starter is nil")
+			}
+			if err := dependencies.startDataRTFunc(ctx, lockedMeasurement.DataSource, nil); err != nil {
+				return measurementUpdateResult{}, fmt.Errorf("start automatic measurement write to dataRT: %w", err)
+			}
+		}
+		return measurementUpdateResult{message: fmt.Sprintf("measurement mode changed to %s", measurementModeName(mode))}, nil
+	case "value":
+		currentMode, err := measurementModeIsAutomatic(lockedMeasurement.Mode)
+		if err != nil {
+			return measurementUpdateResult{}, err
+		}
+		if currentMode {
+			return measurementUpdateResult{}, fmt.Errorf("measurement value is read-only while mode is automatic")
+		}
+		manualValue, ok := value.(float64)
+		if !ok {
+			return measurementUpdateResult{}, fmt.Errorf("measurement value has invalid type %T", value)
+		}
+		failureResult := measurementUpdateResult{
+			measurementID: lockedMeasurement.ID,
+			value:         manualValue,
+			recordFailure: true,
+		}
+		if dependencies.writeManualValueFunc == nil {
+			return failureResult, errcode.ErrMeasurementValueUpdateFailed.WithCause(fmt.Errorf("measurement manual value writer is nil"))
+		}
+		if err := dependencies.writeManualValueFunc(ctx, &lockedMeasurement, manualValue); err != nil {
+			return failureResult, errcode.ErrMeasurementValueUpdateFailed.WithCause(err)
+		}
+		if dependencies.updateDataRTFunc == nil {
+			return failureResult, errcode.ErrMeasurementValueUpdateFailed.WithCause(fmt.Errorf("measurement dataRT updater is nil"))
+		}
+		if err := dependencies.updateDataRTFunc(ctx, lockedMeasurement.DataSource, &manualValue); err != nil {
+			return failureResult, errcode.ErrMeasurementValueUpdateFailed.WithCause(err)
+		}
+		if err := database.AppendMeasurementValueOperation(ctx, tx, lockedMeasurement.ID, 0, manualValue, time.Now().UTC()); err != nil {
+			return failureResult, errcode.ErrMeasurementValueUpdateFailed.WithCause(err)
+		}
+		return measurementUpdateResult{message: "measurement manual value updated"}, nil
+	default:
+		return measurementUpdateResult{}, fmt.Errorf("unsupported measurement update field %q", field)
+	}
+}
+
+func parseOptionalMeasurementModeData(raw json.RawMessage) (*float64, error) {
+	trimmed := bytes.TrimSpace(raw)
+	if len(trimmed) == 0 || bytes.Equal(trimmed, []byte("null")) {
+		return nil, nil
+	}
+	value, err := parseMeasurementUpdateValue(trimmed)
+	if err != nil {
+		return nil, fmt.Errorf("invalid measurement mode data: %w", err)
+	}
+	return &value, nil
+}
+
+func measurementModeName(mode int16) string {
+	if mode == constants.MeasurementModeAutomatic {
+		return "automatic"
+	}
+	return "manual"
+}
+
+func measurementModeIsAutomatic(mode int16) (bool, error) {
+	switch mode {
+	case constants.MeasurementModeManual:
+		return false, nil
+	case constants.MeasurementModeAutomatic:
+		return true, nil
+	default:
+		return false, fmt.Errorf("measurement has invalid mode %d", mode)
+	}
+}
+
+func isInvalidDataObjectUpdateError(err error) bool {
+	return errors.Is(err, common.ErrInvalidParameterToken) ||
+		errors.Is(err, common.ErrParameterTokenNotFound) ||
+		errors.Is(err, common.ErrAmbiguousParameterToken) ||
+		errors.Is(err, common.ErrInvalidMeasurementToken) ||
+		errors.Is(err, common.ErrMeasurementTokenNotFound) ||
+		errors.Is(err, common.ErrAmbiguousMeasurementToken)
+}
+
+func writeMeasurementManualValue(ctx context.Context, measurement *orm.Measurement, value float64) error {
+	key, err := model.GenerateMeasureIdentifier(measurement.DataSource)
+	if err != nil {
+		return fmt.Errorf("generate measurement redis key: %w", err)
+	}
+	zset, err := diagram.NewRedisZSet(ctx, key, 0, false)
+	if err != nil {
+		return fmt.Errorf("create measurement redis zset: %w", err)
+	}
+	if err := zset.ZADD(key, value, strconv.FormatInt(time.Now().UnixNano(), 10)); err != nil {
+		return fmt.Errorf("write manual measurement value to redis: %w", err)
+	}
+	return nil
+}
+
+func callRealTimeDataWriteStopInterface(_ context.Context, _ orm.JSONMap, _ *float64) error {
+	// TODO: call the dataRT HTTP API. A nil value stops automatic writes;
+	// a non-nil value writes the supplied manual measurement value.
+	return nil
+}
+
+func callRealTimeDataWriteStartInterface(_ context.Context, _ orm.JSONMap, _ *float64) error {
+	// TODO: call the dataRT HTTP API to start automatic measurement writes.
+	return nil
+}
+
+func replaceMeasurementRedisValue(ctx context.Context, measurement *orm.Measurement, value float64) error {
+	key, err := model.GenerateMeasureIdentifier(measurement.DataSource)
+	if err != nil {
+		return fmt.Errorf("generate measurement redis key: %w", err)
+	}
+	zset, err := diagram.NewRedisZSet(ctx, key, 0, false)
+	if err != nil {
+		return fmt.Errorf("create measurement redis zset: %w", err)
+	}
+	if err := zset.ZREPLACE(key, value, strconv.FormatInt(time.Now().UnixNano(), 10)); err != nil {
+		return fmt.Errorf("replace manual measurement value in redis: %w", err)
+	}
+	return nil
+}
--- a/handler/data_object_attribute_update_test.go
+++ b/handler/data_object_attribute_update_test.go
@ -0,0 +1,474 @@
+package handler
+
+import (
+	"context"
+	"encoding/json"
+	"fmt"
+	"testing"
+
+	"modelRT/common/errcode"
+	"modelRT/constants"
+	"modelRT/orm"
+
+	"github.com/DATA-DOG/go-sqlmock"
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
+	"gorm.io/driver/postgres"
+	"gorm.io/gorm"
+)
+
+func TestValidateDataObjectAttributeUpdateParameterGroups(t *testing.T) {
+	groups := []string{
+		"rated",
+		"setup",
+		"model",
+		"stable",
+		"craft",
+		"integrity",
+		"behavior",
+	}
+
+	for _, group := range groups {
+		t.Run(group, func(t *testing.T) {
+			request := dataObjectAttributeUpdateRequest{
+				Token: fmt.Sprintf("nspath.component.%s.attribute", group),
+				Field: "VALUE",
+				Value: json.RawMessage(`"15.2"`),
+			}
+
+			dataObjectType, field, value, err := validateDataObjectAttributeUpdate(request)
+			require.NoError(t, err)
+			assert.Equal(t, constants.DataObjectTypeParameter, dataObjectType)
+			assert.Equal(t, "value", field)
+			assert.Equal(t, "15.2", value)
+		})
+	}
+}
+
+func TestValidateDataObjectAttributeUpdateRejectsUnsupportedParameterGroups(t *testing.T) {
+	for _, group := range []string{"component", "base_extend"} {
+		t.Run(group, func(t *testing.T) {
+			_, _, _, err := validateDataObjectAttributeUpdate(dataObjectAttributeUpdateRequest{
+				Token: fmt.Sprintf("nspath.component.%s.attribute", group),
+				Field: "value",
+				Value: json.RawMessage(`"uuid"`),
+			})
+			require.Error(t, err)
+			assert.Contains(t, err.Error(), "do not support token6="+group)
+		})
+	}
+}
+
+func TestValidateDataObjectAttributeUpdateMeasurementFields(t *testing.T) {
+	tests := []struct {
+		name      string
+		field     string
+		value     string
+		expected  any
+		wantError bool
+	}{
+		{name: "numeric value", field: "value", value: `15.2`, expected: float64(15.2)},
+		{name: "numeric string value", field: "value", value: `"15.2"`, expected: float64(15.2)},
+		{name: "automatic mode", field: "mode", value: `1`, expected: constants.MeasurementModeAutomatic},
+		{name: "manual mode", field: "mode", value: `0`, expected: constants.MeasurementModeManual},
+		{name: "boolean mode is rejected", field: "mode", value: `true`, wantError: true},
+		{name: "out of range mode", field: "mode", value: `2`, wantError: true},
+		{name: "unsupported field", field: "name", value: `"measurement"`, wantError: true},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			dataObjectType, field, value, err := validateDataObjectAttributeUpdate(dataObjectAttributeUpdateRequest{
+				Token: "nspath.component.bay.measurement",
+				Field: tt.field,
+				Value: json.RawMessage(tt.value),
+			})
+			if tt.wantError {
+				require.Error(t, err)
+				return
+			}
+			require.NoError(t, err)
+			assert.Equal(t, constants.DataObjectTypeMeasurement, dataObjectType)
+			assert.Equal(t, tt.field, field)
+			assert.Equal(t, tt.expected, value)
+		})
+	}
+}
+
+func TestValidateDataObjectAttributeUpdateAcceptsToken4Token7Measurement(t *testing.T) {
+	dataObjectType, field, value, err := validateDataObjectAttributeUpdate(dataObjectAttributeUpdateRequest{
+		Token: "nspath.measurement",
+		Value: json.RawMessage(`15.2`),
+	})
+	require.NoError(t, err)
+	assert.Equal(t, constants.DataObjectTypeMeasurement, dataObjectType)
+	assert.Equal(t, "value", field)
+	assert.Equal(t, float64(15.2), value)
+}
+
+func TestValidateDataObjectAttributeUpdateRequiredFields(t *testing.T) {
+	tests := []struct {
+		name    string
+		request dataObjectAttributeUpdateRequest
+	}{
+		{name: "missing token", request: dataObjectAttributeUpdateRequest{Field: "value", Value: json.RawMessage(`1`)}},
+		{name: "missing value", request: dataObjectAttributeUpdateRequest{Token: "nspath.measurement", Field: "value"}},
+		{name: "null value", request: dataObjectAttributeUpdateRequest{Token: "nspath.measurement", Field: "value", Value: json.RawMessage(`null`)}},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			_, _, _, err := validateDataObjectAttributeUpdate(tt.request)
+			require.Error(t, err)
+		})
+	}
+}
+
+func TestValidateDataObjectAttributeUpdateDefaultsEmptyFieldToValue(t *testing.T) {
+	tests := []struct {
+		name      string
+		request   dataObjectAttributeUpdateRequest
+		wantType  constants.DataObjectType
+		wantValue any
+	}{
+		{
+			name: "parameter omitted field",
+			request: dataObjectAttributeUpdateRequest{
+				Token: "nspath.component.rated.attribute",
+				Value: json.RawMessage(`"15.2"`),
+			},
+			wantType:  constants.DataObjectTypeParameter,
+			wantValue: "15.2",
+		},
+		{
+			name: "measurement whitespace field",
+			request: dataObjectAttributeUpdateRequest{
+				Token: "nspath.component.bay.measurement",
+				Field: "   ",
+				Value: json.RawMessage(`15.2`),
+			},
+			wantType:  constants.DataObjectTypeMeasurement,
+			wantValue: float64(15.2),
+		},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			dataObjectType, field, value, err := validateDataObjectAttributeUpdate(tt.request)
+			require.NoError(t, err)
+			assert.Equal(t, tt.wantType, dataObjectType)
+			assert.Equal(t, "value", field)
+			assert.Equal(t, tt.wantValue, value)
+		})
+	}
+}
+
+func TestMeasurementModeIsAutomatic(t *testing.T) {
+	automatic, err := measurementModeIsAutomatic(constants.MeasurementModeAutomatic)
+	require.NoError(t, err)
+	assert.True(t, automatic)
+
+	automatic, err = measurementModeIsAutomatic(constants.MeasurementModeManual)
+	require.NoError(t, err)
+	assert.False(t, automatic)
+
+	_, err = measurementModeIsAutomatic(-1)
+	require.Error(t, err)
+	assert.Contains(t, err.Error(), "invalid mode")
+}
+
+func TestUpdateMeasurementDataObjectLocksRowAndUpdatesMode(t *testing.T) {
+	db, mock, closeDB := newDataObjectUpdateTestDB(t)
+	defer closeDB()
+
+	mock.ExpectBegin()
+	tx := db.Begin()
+	require.NoError(t, tx.Error)
+	expectMeasurementResolution(mock, 0)
+	mock.ExpectExec(`UPDATE "measurement" SET .*"mode"=\$1.*"operations"=.*WHERE id = \$4`).
+		WithArgs(constants.MeasurementModeAutomatic, sqlmock.AnyArg(), 500, int64(10)).
+		WillReturnResult(sqlmock.NewResult(0, 1))
+	mock.ExpectRollback()
+
+	startCalled := false
+	result, err := updateMeasurementDataObject(context.Background(), tx, "nspath.measurement", "mode", constants.MeasurementModeAutomatic, nil, measurementUpdateDependencies{
+		startDataRTFunc: func(_ context.Context, dataSource orm.JSONMap, value *float64) error {
+			startCalled = true
+			assert.Equal(t, float64(1), dataSource["type"])
+			assert.Nil(t, value)
+			return nil
+		},
+	})
+	require.NoError(t, err)
+	assert.True(t, startCalled)
+	assert.Contains(t, result.message, "automatic")
+	require.NoError(t, tx.Rollback().Error)
+	require.NoError(t, mock.ExpectationsWereMet())
+}
+
+func TestUpdateMeasurementModeToAutomaticReturnsErrorWhenDataRTStartFails(t *testing.T) {
+	db, mock, closeDB := newDataObjectUpdateTestDB(t)
+	defer closeDB()
+
+	mock.ExpectBegin()
+	tx := db.Begin()
+	require.NoError(t, tx.Error)
+	expectMeasurementResolution(mock, constants.MeasurementModeManual)
+	mock.ExpectExec(`UPDATE "measurement" SET .*"mode"=\$1.*"operations"=.*WHERE id = \$4`).
+		WithArgs(constants.MeasurementModeAutomatic, sqlmock.AnyArg(), 500, int64(10)).
+		WillReturnResult(sqlmock.NewResult(0, 1))
+	mock.ExpectRollback()
+
+	_, err := updateMeasurementDataObject(context.Background(), tx, "nspath.measurement", "mode", constants.MeasurementModeAutomatic, nil, measurementUpdateDependencies{
+		startDataRTFunc: func(context.Context, orm.JSONMap, *float64) error {
+			return fmt.Errorf("dataRT unavailable")
+		},
+	})
+	require.Error(t, err)
+	assert.Contains(t, err.Error(), "start automatic measurement write")
+	require.NoError(t, tx.Rollback().Error)
+	require.NoError(t, mock.ExpectationsWereMet())
+}
+
+func TestUpdateMeasurementDataObjectReturnsMessageWhenModeIsUnchanged(t *testing.T) {
+	db, mock, closeDB := newDataObjectUpdateTestDB(t)
+	defer closeDB()
+
+	mock.ExpectBegin()
+	tx := db.Begin()
+	require.NoError(t, tx.Error)
+	expectMeasurementResolution(mock, 1)
+	mock.ExpectRollback()
+
+	result, err := updateMeasurementDataObject(context.Background(), tx, "nspath.measurement", "mode", constants.MeasurementModeAutomatic, nil, measurementUpdateDependencies{})
+	require.NoError(t, err)
+	assert.Contains(t, result.message, "already")
+	require.NoError(t, tx.Rollback().Error)
+	require.NoError(t, mock.ExpectationsWereMet())
+}
+
+func TestUpdateMeasurementModeToManualWithoutDataOnlyStopsDataRT(t *testing.T) {
+	db, mock, closeDB := newDataObjectUpdateTestDB(t)
+	defer closeDB()
+
+	mock.ExpectBegin()
+	tx := db.Begin()
+	require.NoError(t, tx.Error)
+	expectMeasurementResolution(mock, constants.MeasurementModeAutomatic)
+	mock.ExpectExec(`UPDATE "measurement" SET .*"mode"=\$1.*"operations"=.*WHERE id = \$4`).
+		WithArgs(constants.MeasurementModeManual, sqlmock.AnyArg(), 500, int64(10)).
+		WillReturnResult(sqlmock.NewResult(0, 1))
+	mock.ExpectRollback()
+
+	stopCalled := false
+	replaceCalled := false
+	result, err := updateMeasurementDataObject(context.Background(), tx, "nspath.measurement", "mode", constants.MeasurementModeManual, nil, measurementUpdateDependencies{
+		updateDataRTFunc: func(_ context.Context, dataSource orm.JSONMap, value *float64) error {
+			stopCalled = true
+			assert.Equal(t, float64(1), dataSource["type"])
+			assert.Nil(t, value)
+			return nil
+		},
+		replaceRedisValueFunc: func(context.Context, *orm.Measurement, float64) error {
+			replaceCalled = true
+			return nil
+		},
+	})
+	require.NoError(t, err)
+	assert.True(t, stopCalled)
+	assert.False(t, replaceCalled)
+	assert.Contains(t, result.message, "manual")
+	require.NoError(t, tx.Rollback().Error)
+	require.NoError(t, mock.ExpectationsWereMet())
+}
+
+func TestUpdateMeasurementModeToManualReplacesRedisValueWhenDataProvided(t *testing.T) {
+	db, mock, closeDB := newDataObjectUpdateTestDB(t)
+	defer closeDB()
+
+	mock.ExpectBegin()
+	tx := db.Begin()
+	require.NoError(t, tx.Error)
+	expectMeasurementResolution(mock, constants.MeasurementModeAutomatic)
+	mock.ExpectExec(`UPDATE "measurement" SET .*"mode"=\$1.*"operations"=.*WHERE id = \$4`).
+		WithArgs(constants.MeasurementModeManual, sqlmock.AnyArg(), 500, int64(10)).
+		WillReturnResult(sqlmock.NewResult(0, 1))
+	mock.ExpectRollback()
+
+	callOrder := make([]string, 0, 2)
+	result, err := updateMeasurementDataObject(context.Background(), tx, "nspath.measurement", "mode", constants.MeasurementModeManual, json.RawMessage(`0`), measurementUpdateDependencies{
+		updateDataRTFunc: func(_ context.Context, _ orm.JSONMap, value *float64) error {
+			callOrder = append(callOrder, "stop-dataRT")
+			assert.Nil(t, value)
+			return nil
+		},
+		replaceRedisValueFunc: func(_ context.Context, measurement *orm.Measurement, value float64) error {
+			callOrder = append(callOrder, "replace-redis")
+			assert.Equal(t, int64(10), measurement.ID)
+			assert.Equal(t, float64(0), value)
+			return nil
+		},
+	})
+	require.NoError(t, err)
+	assert.Equal(t, []string{"stop-dataRT", "replace-redis"}, callOrder)
+	assert.Contains(t, result.message, "manual")
+	require.NoError(t, tx.Rollback().Error)
+	require.NoError(t, mock.ExpectationsWereMet())
+}
+
+func TestUpdateMeasurementModeToManualDoesNotTouchRedisWhenDataRTStopFails(t *testing.T) {
+	db, mock, closeDB := newDataObjectUpdateTestDB(t)
+	defer closeDB()
+
+	mock.ExpectBegin()
+	tx := db.Begin()
+	require.NoError(t, tx.Error)
+	expectMeasurementResolution(mock, constants.MeasurementModeAutomatic)
+	mock.ExpectExec(`UPDATE "measurement" SET .*"mode"=\$1.*"operations"=.*WHERE id = \$4`).
+		WithArgs(constants.MeasurementModeManual, sqlmock.AnyArg(), 500, int64(10)).
+		WillReturnResult(sqlmock.NewResult(0, 1))
+	mock.ExpectRollback()
+
+	replaceCalled := false
+	_, err := updateMeasurementDataObject(context.Background(), tx, "nspath.measurement", "mode", constants.MeasurementModeManual, json.RawMessage(`15.2`), measurementUpdateDependencies{
+		updateDataRTFunc: func(_ context.Context, _ orm.JSONMap, value *float64) error {
+			assert.Nil(t, value)
+			return fmt.Errorf("dataRT unavailable")
+		},
+		replaceRedisValueFunc: func(context.Context, *orm.Measurement, float64) error {
+			replaceCalled = true
+			return nil
+		},
+	})
+	require.Error(t, err)
+	assert.Contains(t, err.Error(), "stop automatic measurement write")
+	assert.False(t, replaceCalled)
+	require.NoError(t, tx.Rollback().Error)
+	require.NoError(t, mock.ExpectationsWereMet())
+}
+
+func TestParseOptionalMeasurementModeData(t *testing.T) {
+	for _, raw := range []json.RawMessage{nil, json.RawMessage(`null`)} {
+		value, err := parseOptionalMeasurementModeData(raw)
+		require.NoError(t, err)
+		assert.Nil(t, value)
+	}
+
+	value, err := parseOptionalMeasurementModeData(json.RawMessage(`"15.2"`))
+	require.NoError(t, err)
+	require.NotNil(t, value)
+	assert.Equal(t, 15.2, *value)
+
+	_, err = parseOptionalMeasurementModeData(json.RawMessage(`"invalid"`))
+	require.Error(t, err)
+}
+
+func TestUpdateMeasurementDataObjectRejectsValueInAutomaticMode(t *testing.T) {
+	db, mock, closeDB := newDataObjectUpdateTestDB(t)
+	defer closeDB()
+
+	mock.ExpectBegin()
+	tx := db.Begin()
+	require.NoError(t, tx.Error)
+	expectMeasurementResolution(mock, 1)
+	mock.ExpectRollback()
+
+	_, err := updateMeasurementDataObject(context.Background(), tx, "nspath.measurement", "value", float64(15.2), nil, measurementUpdateDependencies{})
+	require.Error(t, err)
+	assert.Contains(t, err.Error(), "read-only")
+	require.NoError(t, tx.Rollback().Error)
+	require.NoError(t, mock.ExpectationsWereMet())
+}
+
+func TestUpdateMeasurementDataObjectWritesValueInManualMode(t *testing.T) {
+	db, mock, closeDB := newDataObjectUpdateTestDB(t)
+	defer closeDB()
+
+	mock.ExpectBegin()
+	tx := db.Begin()
+	require.NoError(t, tx.Error)
+	expectMeasurementResolution(mock, 0)
+	mock.ExpectExec(`UPDATE "measurement" SET "operations"=.*WHERE id = \$3`).
+		WithArgs(sqlmock.AnyArg(), 500, int64(10)).
+		WillReturnResult(sqlmock.NewResult(0, 1))
+	mock.ExpectRollback()
+
+	called := false
+	writer := func(_ context.Context, measurement *orm.Measurement, value float64) error {
+		called = true
+		assert.Equal(t, int64(10), measurement.ID)
+		assert.Equal(t, float64(15.2), value)
+		return nil
+	}
+	dataRTCalled := false
+	dataRTWriter := func(_ context.Context, dataSource orm.JSONMap, value *float64) error {
+		dataRTCalled = true
+		require.NotNil(t, value)
+		assert.Equal(t, float64(15.2), *value)
+		assert.Equal(t, float64(1), dataSource["type"])
+		return nil
+	}
+	result, err := updateMeasurementDataObject(context.Background(), tx, "nspath.measurement", "value", float64(15.2), nil, measurementUpdateDependencies{
+		writeManualValueFunc: writer,
+		updateDataRTFunc:     dataRTWriter,
+	})
+	require.NoError(t, err)
+	assert.True(t, called)
+	assert.True(t, dataRTCalled)
+	assert.Contains(t, result.message, "updated")
+	assert.False(t, result.recordFailure)
+	require.NoError(t, tx.Rollback().Error)
+	require.NoError(t, mock.ExpectationsWereMet())
+}
+
+func TestUpdateMeasurementDataObjectReturnsFailureResultAndAppError(t *testing.T) {
+	db, mock, closeDB := newDataObjectUpdateTestDB(t)
+	defer closeDB()
+
+	mock.ExpectBegin()
+	tx := db.Begin()
+	require.NoError(t, tx.Error)
+	expectMeasurementResolution(mock, 0)
+	mock.ExpectRollback()
+
+	writeErr := fmt.Errorf("write value failed")
+	writer := func(context.Context, *orm.Measurement, float64) error { return writeErr }
+	result, err := updateMeasurementDataObject(context.Background(), tx, "nspath.measurement", "value", float64(15.2), nil, measurementUpdateDependencies{
+		writeManualValueFunc: writer,
+	})
+	require.Error(t, err)
+	assert.ErrorIs(t, err, errcode.ErrMeasurementValueUpdateFailed)
+	assert.ErrorIs(t, err, writeErr)
+	assert.True(t, result.recordFailure)
+	assert.Equal(t, int64(10), result.measurementID)
+	assert.Equal(t, float64(15.2), result.value)
+	require.NoError(t, tx.Rollback().Error)
+	require.NoError(t, mock.ExpectationsWereMet())
+}
+
+func newDataObjectUpdateTestDB(t *testing.T) (*gorm.DB, sqlmock.Sqlmock, func()) {
+	t.Helper()
+	sqlDB, mock, err := sqlmock.New()
+	require.NoError(t, err)
+	db, err := gorm.Open(postgres.New(postgres.Config{Conn: sqlDB}), &gorm.Config{SkipDefaultTransaction: true})
+	require.NoError(t, err)
+	return db, mock, func() { _ = sqlDB.Close() }
+}
+
+func expectMeasurementResolution(mock sqlmock.Sqlmock, mode int16) {
+	const componentUUID = "70c190f2-8a60-42a9-b143-ec5f87e0aa6b"
+	mock.ExpectQuery(`(?s)SELECT m\.\*.*WHERE c\.nspath = \$1.*AND m\.tag = \$2.*LIMIT 2`).
+		WithArgs("nspath", "measurement").
+		WillReturnRows(sqlmock.NewRows([]string{
+			"id", "tag", "mode", "data_source", "component_uuid",
+		}).AddRow(int64(10), "measurement", mode, `{"type":1,"io_address":{"station":"station","device":"device","channel":"tm1"}}`, componentUUID))
+	mock.ExpectQuery(`(?s)SELECT global_uuid, nspath, tag, grid, zone, station.*WHERE global_uuid = \$1.*LIMIT 1`).
+		WithArgs(componentUUID).
+		WillReturnRows(sqlmock.NewRows([]string{"global_uuid", "nspath", "tag"}).
+			AddRow(componentUUID, "nspath", "component"))
+	mock.ExpectQuery(`SELECT "id","mode","data_source" FROM "measurement" WHERE id = \$1 LIMIT \$2 FOR UPDATE`).
+		WithArgs(int64(10), 1).
+		WillReturnRows(sqlmock.NewRows([]string{
+			"id", "tag", "mode", "data_source", "component_uuid",
+		}).AddRow(int64(10), "measurement", mode, `{"type":1,"io_address":{"station":"station","device":"device","channel":"tm1"}}`, componentUUID))
+}
--- a/handler/data_object_recommend.go
+++ b/handler/data_object_recommend.go
@ -13,14 +13,14 @@ import (
 	"github.com/gin-gonic/gin"
 )

-// MeasurementRecommendHandler define measurement recommend API
+// DataObjectRecommendHandler define data-object recommend API
 // @Summary 测量点推荐（搜索框自动补全）
 // @Description 根据用户输入的字符串，从 Redis 中查询可能的测量点或结构路径，并提供推荐列表。
-// @Tags Measurement Recommend
+// @Tags DataObject Recommend
 // @Accept json
 // @Produce json
 // @Param input query string true "推荐关键词,例如 'grid1' 或 'grid1.'" Example("grid1")
-// @Success 200 {object} network.SuccessResponse{payload=network.MeasurementRecommendPayload} "返回推荐列表成功"
+// @Success 200 {object} network.SuccessResponse{payload=network.DataObjectRecommendPayload} "返回推荐列表成功"
 //
 //	@Example 200 {
 //	    "code": 200,
@ -43,25 +43,25 @@ import (
 //	    "msg": "failed to get recommend data from redis",
 //	}
 //
-// @Router /measurement/recommend [get]
-func MeasurementRecommendHandler(c *gin.Context) {
+// @Router /data-object/recommend [get]
+func DataObjectRecommendHandler(c *gin.Context) {
 	ctx := c.Request.Context()
-	var request network.MeasurementRecommendRequest
+	var request network.DataObjectRecommendRequest

 	if err := c.ShouldBindQuery(&request); err != nil {
-		logger.Error(ctx, "failed to bind measurement recommend request", "error", err)
+		logger.Error(ctx, "failed to bind data object recommend request", "error", err)
 		renderRespFailure(c, constants.RespCodeInvalidParams, err.Error(), nil)
 		return
 	}
-	if err := validateMeasurementRecommendInput(request.Input); err != nil {
-		logger.Warn(ctx, "invalid measurement recommend input", "input", request.Input, "error", err)
+	if err := validateDataObjectRecommendInput(request.Input); err != nil {
+		logger.Warn(ctx, "invalid data object recommend input", "input", request.Input, "error", err)
 		renderRespFailure(c, constants.RespCodeInvalidParams, err.Error(), map[string]any{
 			"input": request.Input,
 		})
 		return
 	}
 	recommendResults := model.RedisSearchRecommend(ctx, request.Input)
-	payload := network.MeasurementRecommendPayload{
+	payload := network.DataObjectRecommendPayload{
 		Input:           request.Input,
 		RecommendedList: make([]string, 0),
 	}
@ -117,7 +117,7 @@ func orderedRecommendResults(recommendResults map[string]model.SearchResult) []m
 	return results
 }

-func validateMeasurementRecommendInput(input string) error {
+func validateDataObjectRecommendInput(input string) error {
 	if strings.Contains(input, "..") {
 		return errors.New("input contains continuous dots")
 	}
--- a/handler/diagram_node_link.go
+++ b/handler/diagram_node_link.go
@ -85,7 +85,12 @@ func DiagramNodeLinkHandler(c *gin.Context) {
 		return
 	}

-	prevLinkSet, currLinkSet := generateLinkSet(ctx, nodeLevel, prevNodeInfo)
+	prevLinkSet, currLinkSet, err := generateLinkSet(ctx, nodeLevel, prevNodeInfo)
+	if err != nil {
+		logger.Error(ctx, "create diagram link redis sets failed", "node_id", nodeID, "level", nodeLevel, "error", err)
+		c.JSON(http.StatusOK, network.FailureResponse{Code: http.StatusInternalServerError, Msg: err.Error()})
+		return
+	}
 	err = processLinkSetData(ctx, action, nodeLevel, prevLinkSet, currLinkSet, prevNodeInfo, currNodeInfo)
 	if err != nil {
 		c.JSON(http.StatusOK, network.FailureResponse{
@ -113,21 +118,27 @@ func DiagramNodeLinkHandler(c *gin.Context) {
 	})
 }

-func generateLinkSet(ctx context.Context, level int, prevNodeInfo orm.CircuitDiagramNodeInterface) (*diagram.RedisSet, *diagram.RedisSet) {
+func generateLinkSet(ctx context.Context, level int, prevNodeInfo orm.CircuitDiagramNodeInterface) (*diagram.RedisSet, *diagram.RedisSet, error) {
 	config, ok := linkSetConfigs[level]
 	// level not supported
 	if !ok {
-		return nil, nil
+		return nil, nil, nil
 	}

-	currLinkSet := diagram.NewRedisSet(ctx, config.CurrKey, 0, false)
+	currLinkSet, err := diagram.NewRedisSet(ctx, config.CurrKey, 0, false)
+	if err != nil {
+		return nil, nil, err
+	}
 	if config.PrevIsNil {
-		return nil, currLinkSet
+		return nil, currLinkSet, nil
 	}

 	prevLinkSetKey := fmt.Sprintf(config.PrevKeyTemplate, prevNodeInfo.GetTagName())
-	prevLinkSet := diagram.NewRedisSet(ctx, prevLinkSetKey, 0, false)
-	return prevLinkSet, currLinkSet
+	prevLinkSet, err := diagram.NewRedisSet(ctx, prevLinkSetKey, 0, false)
+	if err != nil {
+		return nil, nil, err
+	}
+	return prevLinkSet, currLinkSet, nil
 }

 func processLinkSetData(ctx context.Context, action string, level int, prevLinkSet, currLinkSet *diagram.RedisSet, prevNodeInfo, currNodeInfo orm.CircuitDiagramNodeInterface) error {
--- a/handler/measurement_load.go
+++ b/handler/measurement_load.go
@ -39,7 +39,12 @@ func MeasurementGetHandler(c *gin.Context) {
 		return
 	}

-	zset := diagram.NewRedisZSet(ctx, request.MeasurementToken, 0, false)
+	zset, err := diagram.NewRedisZSet(ctx, request.MeasurementToken, 0, false)
+	if err != nil {
+		logger.Error(ctx, "failed to create measurement redis zset", "measurement_token", request.MeasurementToken, "error", err)
+		c.JSON(http.StatusOK, network.FailureResponse{Code: http.StatusInternalServerError, Msg: err.Error()})
+		return
+	}
 	points, err := zset.ZRANGE(request.MeasurementToken, 0, -1)
 	if err != nil {
 		logger.Error(ctx, "failed to get measurement data from redis", "measurement_token", request.MeasurementToken, "error", err)
--- a/handler/measurement_recommend_test.go
+++ b/handler/measurement_recommend_test.go
@ -32,7 +32,7 @@ func TestValidateMeasurementRecommendInput(t *testing.T) {

 	for _, tt := range tests {
 		t.Run(tt.name, func(t *testing.T) {
-			err := validateMeasurementRecommendInput(tt.input)
+			err := validateDataObjectRecommendInput(tt.input)
 			if tt.valid && err != nil {
 				t.Fatalf("expected valid input, got error %v", err)
 			}
--- a/handler/mesurement_link.go
+++ b/handler/mesurement_link.go
@ -75,9 +75,19 @@ func MeasurementLinkHandler(c *gin.Context) {
 		return
 	}

-	allMeasSet := diagram.NewRedisSet(ctx, constants.RedisAllMeasTagSetKey, 0, false)
+	allMeasSet, err := diagram.NewRedisSet(ctx, constants.RedisAllMeasTagSetKey, 0, false)
+	if err != nil {
+		logger.Error(ctx, "create all-measurement redis set failed", "error", err)
+		c.JSON(http.StatusOK, network.FailureResponse{Code: http.StatusInternalServerError, Msg: err.Error()})
+		return
+	}
 	compMeasLinkKey := fmt.Sprintf(constants.RedisSpecCompTagMeasSetKey, componentInfo.Tag)
-	compMeasLinkSet := diagram.NewRedisSet(ctx, compMeasLinkKey, 0, false)
+	compMeasLinkSet, err := diagram.NewRedisSet(ctx, compMeasLinkKey, 0, false)
+	if err != nil {
+		logger.Error(ctx, "create component-measurement redis set failed", "set_key", compMeasLinkKey, "error", err)
+		c.JSON(http.StatusOK, network.FailureResponse{Code: http.StatusInternalServerError, Msg: err.Error()})
+		return
+	}

 	switch action {
 	case constants.SearchLinkAddAction:
--- a/logger/caller_test.go
+++ b/logger/caller_test.go
@ -0,0 +1,50 @@
+package logger_test
+
+import (
+	"context"
+	"io"
+	"os"
+	"strings"
+	"testing"
+	"time"
+
+	"modelRT/config"
+	"modelRT/constants"
+	"modelRT/logger"
+
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
+)
+
+func TestCallerPointsToBusinessCode(t *testing.T) {
+	reader, writer, err := os.Pipe()
+	require.NoError(t, err)
+	originalStdout := os.Stdout
+	os.Stdout = writer
+	t.Cleanup(func() {
+		os.Stdout = originalStdout
+		_ = reader.Close()
+		_ = writer.Close()
+	})
+
+	logger.InitLoggerInstance(config.LoggerConfig{
+		Mode:  constants.DevelopmentLogMode,
+		Level: "info",
+	})
+
+	logger.Info(context.Background(), "facade caller test")
+	logger.NewGormLogger().Trace(context.Background(), time.Now(), func() (string, int64) {
+		return "SELECT 1", 1
+	}, nil)
+	require.NoError(t, writer.Close())
+
+	outputBytes, err := io.ReadAll(reader)
+	require.NoError(t, err)
+	output := string(outputBytes)
+
+	assert.NotContains(t, output, "logger/facede.go")
+	assert.NotContains(t, output, `"func":"modelRT/logger.Info"`)
+	assert.NotContains(t, output, "gorm.io/gorm")
+	assert.Contains(t, output, "caller_test.go")
+	assert.True(t, strings.Count(output, "modelRT/logger_test.TestCallerPointsToBusinessCode") >= 2)
+}
--- a/logger/facede.go
+++ b/logger/facede.go
@ -18,8 +18,6 @@ type facade struct {
 	_logger *zap.Logger
 }

-const facadeCallerSkip = 2
-
 // Debug define facade func of debug level log
 func Debug(ctx context.Context, msg string, kv ...any) {
 	logFacade().log(ctx, zapcore.DebugLevel, msg, kv...)
@ -41,16 +39,17 @@ func Error(ctx context.Context, msg string, kv ...any) {
 }

 func (f *facade) log(ctx context.Context, lvl zapcore.Level, msg string, kv ...any) {
-	f.logSkip(ctx, lvl, 1, msg, kv...)
+	f.logSkip(ctx, lvl, 0, msg, kv...)
 }

 func (f *facade) logSkip(ctx context.Context, lvl zapcore.Level, extraSkip int, msg string, kv ...any) {
-	fields := makeLogFieldsSkip(ctx, extraSkip, kv...)
-	logger := f._logger
-	if extraSkip > 0 {
-		logger = logger.WithOptions(zap.AddCallerSkip(extraSkip))
+	caller := resolveLoggerCaller(extraSkip)
+	fields := makeLogFieldsWithCaller(ctx, caller, kv...)
+	ce := f._logger.Check(lvl, msg)
+	if ce == nil {
+		return
 	}
-	ce := logger.Check(lvl, msg)
+	setCheckedEntryCaller(ce, caller)
 	ce.Write(fields...)
 }

@ -72,7 +71,7 @@ func InfoSkip(ctx context.Context, extraSkip int, msg string, kv ...any) {
 func logFacade() *facade {
 	fOnce.Do(func() {
 		f = &facade{
-			_logger: GetLoggerInstance().WithOptions(zap.AddCallerSkip(facadeCallerSkip)),
+			_logger: GetLoggerInstance(),
 		}
 	})
 	return f
--- a/logger/gorm_logger.go
+++ b/logger/gorm_logger.go
@ -50,12 +50,12 @@ func (l *GormLogger) Trace(ctx context.Context, begin time.Time, fc func() (sql
 	// get gorm exec sql and rows affected
 	sql, rows := fc()
 	if err != nil && !errors.Is(err, gorm.ErrRecordNotFound) {
-		ErrorSkip(ctx, 1, "SQL ERROR", "sql", sql, "rows", rows, "dur(ms)", duration)
+		ErrorSkip(ctx, 0, "SQL ERROR", "sql", sql, "rows", rows, "dur(ms)", duration)
 		return
 	}
 	if duration > l.SlowThreshold.Milliseconds() {
-		WarnSkip(ctx, 1, "SQL SLOW", "sql", sql, "rows", rows, "dur(ms)", duration)
+		WarnSkip(ctx, 0, "SQL SLOW", "sql", sql, "rows", rows, "dur(ms)", duration)
 	} else {
-		InfoSkip(ctx, 1, "SQL INFO", "sql", sql, "rows", rows, "dur(ms)", duration)
+		InfoSkip(ctx, 0, "SQL INFO", "sql", sql, "rows", rows, "dur(ms)", duration)
 	}
 }
--- a/logger/logger.go
+++ b/logger/logger.go
@ -5,6 +5,7 @@ import (
 	"context"
 	"path"
 	"runtime"
+	"strings"

 	"go.opentelemetry.io/otel/trace"
 	"go.uber.org/zap"
@ -41,8 +42,13 @@ func (l *logger) Error(msg string, kv ...any) {
 }

 func (l *logger) log(lvl zapcore.Level, msg string, kv ...any) {
-	fields := makeLogFields(l.ctx, kv...)
+	caller := resolveLoggerCaller(0)
+	fields := makeLogFieldsWithCaller(l.ctx, caller, kv...)
 	ce := l._logger.Check(lvl, msg)
+	if ce == nil {
+		return
+	}
+	setCheckedEntryCaller(ce, caller)
 	ce.Write(fields...)
 }

@ -51,6 +57,10 @@ func makeLogFields(ctx context.Context, kv ...any) []zap.Field {
 }

 func makeLogFieldsSkip(ctx context.Context, extraSkip int, kv ...any) []zap.Field {
+	return makeLogFieldsWithCaller(ctx, resolveLoggerCaller(extraSkip), kv...)
+}
+
+func makeLogFieldsWithCaller(ctx context.Context, caller loggerCaller, kv ...any) []zap.Field {
 	if len(kv)%2 != 0 {
 		kv = append(kv, "unknown")
 	}
@ -60,8 +70,7 @@ func makeLogFieldsSkip(ctx context.Context, extraSkip int, kv ...any) []zap.Fiel
 	spanID := spanCtx.SpanID().String()
 	kv = append(kv, "traceID", traceID, "spanID", spanID)

-	funcName, file, line := getLoggerCallerInfoSkip(extraSkip)
-	kv = append(kv, "func", funcName, "file", file, "line", line)
+	kv = append(kv, "func", caller.funcName, "file", caller.shortFile, "line", caller.line)
 	fields := make([]zap.Field, 0, len(kv)/2)
 	for i := 0; i < len(kv); i += 2 {
 		key := kv[i].(string)
@ -95,13 +104,59 @@ func getLoggerCallerInfo() (funcName, file string, line int) {

 // getLoggerCallerInfoSkip returns caller info with additional skip frames beyond the standard depth.
 func getLoggerCallerInfoSkip(extraSkip int) (funcName, file string, line int) {
-	pc, file, line, ok := runtime.Caller(4 + extraSkip)
-	if !ok {
+	caller := resolveLoggerCaller(extraSkip)
+	return caller.funcName, caller.shortFile, caller.line
+}
+
+type loggerCaller struct {
+	pc        uintptr
+	funcName  string
+	fullFile  string
+	shortFile string
+	line      int
+}
+
+func resolveLoggerCaller(extraSkip int) loggerCaller {
+	pcs := make([]uintptr, 32)
+	count := runtime.Callers(2, pcs)
+	frames := runtime.CallersFrames(pcs[:count])
+
+	for {
+		frame, more := frames.Next()
+		if !isLoggerInfrastructureFrame(frame.Function) {
+			if extraSkip > 0 {
+				extraSkip--
+			} else {
+				return loggerCaller{
+					pc:        frame.PC,
+					funcName:  frame.Function,
+					fullFile:  frame.File,
+					shortFile: path.Base(frame.File),
+					line:      frame.Line,
+				}
+			}
+		}
+		if !more {
+			return loggerCaller{}
+		}
+	}
+}
+
+func isLoggerInfrastructureFrame(function string) bool {
+	return strings.HasPrefix(function, "modelRT/logger.") ||
+		strings.HasPrefix(function, "gorm.io/gorm")
+}
+
+func setCheckedEntryCaller(entry *zapcore.CheckedEntry, caller loggerCaller) {
+	if caller.pc == 0 {
 		return
 	}
-	file = path.Base(file)
-	funcName = runtime.FuncForPC(pc).Name()
-	return
+	entry.Entry.Caller = zapcore.EntryCaller{
+		Defined: true,
+		PC:      caller.pc,
+		File:    caller.fullFile,
+		Line:    caller.line,
+	}
 }

 // New returns a logger bound to ctx. Trace fields (traceID, spanID) are extracted
--- a/middleware/token.go
+++ b/middleware/token.go
@ -1,12 +1,20 @@
 // Package middleware define gin framework middlewares
 package middleware

-import "github.com/gin-gonic/gin"
+import (
+	"context"
+
+	"modelRT/constants"
+
+	"github.com/gin-gonic/gin"
+)

 // SetTokenMiddleware define a middleware for set token in context
 func SetTokenMiddleware(clientToken string) gin.HandlerFunc {
 	return func(c *gin.Context) {
-		c.Set("client_token", clientToken)
+		c.Set(constants.ClientTokenContextName, clientToken)
+		requestCtx := context.WithValue(c.Request.Context(), constants.CtxKeyClientToken, clientToken)
+		c.Request = c.Request.WithContext(requestCtx)
 		c.Next()
 	}
 }
--- a/middleware/token_test.go
+++ b/middleware/token_test.go
@ -0,0 +1,28 @@
+package middleware
+
+import (
+	"net/http"
+	"net/http/httptest"
+	"testing"
+
+	"modelRT/constants"
+
+	"github.com/gin-gonic/gin"
+	"github.com/stretchr/testify/assert"
+)
+
+func TestSetTokenMiddlewarePropagatesClientToken(t *testing.T) {
+	gin.SetMode(gin.TestMode)
+	router := gin.New()
+	router.Use(SetTokenMiddleware("test-token"))
+	router.GET("/test", func(c *gin.Context) {
+		assert.Equal(t, "test-token", c.GetString(constants.ClientTokenContextName))
+		assert.Equal(t, "test-token", c.Request.Context().Value(constants.CtxKeyClientToken))
+		c.Status(http.StatusNoContent)
+	})
+
+	request := httptest.NewRequest(http.MethodGet, "/test", nil)
+	response := httptest.NewRecorder()
+	router.ServeHTTP(response, request)
+	assert.Equal(t, http.StatusNoContent, response.Code)
+}
--- a/model/attribute_group_recommend_model.go
+++ b/model/attribute_group_recommend_model.go
@ -33,13 +33,19 @@ func TraverseAttributeGroupTables(ctx context.Context, db *gorm.DB, compTagToFul
 	var tableNames []string

 	excludedTables := []string{"component", ""}
+	var projectTableNames []string
 	result := db.Model(&orm.ProjectManager{}).
 		Where("name NOT IN ?", excludedTables).
-		Pluck("name", &tableNames)
+		Pluck("name", &projectTableNames)
 	if result.Error != nil && result.Error != gorm.ErrRecordNotFound {
 		logger.Error(ctx, "query name column data from postgres table failed", "err", result.Error)
 		return result.Error
 	}
+	for _, tableName := range projectTableNames {
+		if constants.IsSupportedParameterTableName(tableName) {
+			tableNames = append(tableNames, tableName)
+		}
+	}

 	if len(tableNames) == 0 {
 		logger.Info(ctx, "query from postgres successed, but no records found")
--- a/model/data_object_token.go
+++ b/model/data_object_token.go
@ -0,0 +1,53 @@
+// Package model defines data models and domain rules for model runtime service.
+package model
+
+import (
+	"fmt"
+	"slices"
+	"strings"
+
+	"modelRT/constants"
+)
+
+var parameterAttributeGroups = map[string]struct{}{
+	"component":   {},
+	"base_extend": {},
+	"rated":       {},
+	"setup":       {},
+	"model":       {},
+	"stable":      {},
+	"craft":       {},
+	"integrity":   {},
+	"behavior":    {},
+}
+
+// ClassifyDataObjectToken determines whether token identifies a parameter or a
+// measurement. Seven-part and four-part tokens are classified by token6, while
+// two-part tokens are treated as measurements at the current stage.
+func ClassifyDataObjectToken(token string) (constants.DataObjectType, error) {
+	parts := strings.Split(token, ".")
+	if slices.Contains(parts, "") {
+		return "", fmt.Errorf("invalid data object token %q: token segment cannot be empty", token)
+	}
+
+	switch len(parts) {
+	case 2:
+		return constants.DataObjectTypeMeasurement, nil
+	case 4, 7:
+		token6Index := 2
+		if len(parts) == 7 {
+			token6Index = 5
+		}
+
+		token6 := parts[token6Index]
+		if _, ok := parameterAttributeGroups[token6]; ok {
+			return constants.DataObjectTypeParameter, nil
+		}
+		if token6 == "bay" {
+			return constants.DataObjectTypeMeasurement, nil
+		}
+		return "", fmt.Errorf("invalid data object token %q: unsupported token6 %q", token, token6)
+	default:
+		return "", fmt.Errorf("invalid data object token %q: expected 2, 4, or 7 segments, got %d", token, len(parts))
+	}
+}
--- a/model/data_object_token_test.go
+++ b/model/data_object_token_test.go
@ -0,0 +1,109 @@
+package model
+
+import (
+	"testing"
+
+	"modelRT/constants"
+
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
+)
+
+func TestClassifyDataObjectToken(t *testing.T) {
+	tests := []struct {
+		name     string
+		token    string
+		expected constants.DataObjectType
+		wantErr  string
+	}{
+		{
+			name:     "seven-part measurement",
+			token:    "grid.zone.station.nspath.component.bay.measurement",
+			expected: constants.DataObjectTypeMeasurement,
+		},
+		{
+			name:     "four-part measurement",
+			token:    "nspath.component.bay.measurement",
+			expected: constants.DataObjectTypeMeasurement,
+		},
+		{
+			name:     "two-part measurement",
+			token:    "nspath.measurement",
+			expected: constants.DataObjectTypeMeasurement,
+		},
+		{
+			name:     "seven-part parameter",
+			token:    "grid.zone.station.nspath.component.rated.voltage",
+			expected: constants.DataObjectTypeParameter,
+		},
+		{
+			name:     "four-part parameter",
+			token:    "nspath.component.base_extend.description",
+			expected: constants.DataObjectTypeParameter,
+		},
+		{
+			name:     "component group",
+			token:    "nspath.component.component.name",
+			expected: constants.DataObjectTypeParameter,
+		},
+		{
+			name:    "unknown group",
+			token:   "nspath.component.unknown.name",
+			wantErr: "unsupported token6",
+		},
+		{
+			name:    "invalid segment count",
+			token:   "grid.zone.station",
+			wantErr: "expected 2, 4, or 7 segments",
+		},
+		{
+			name:    "empty segment",
+			token:   "nspath..bay.measurement",
+			wantErr: "token segment cannot be empty",
+		},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			actual, err := ClassifyDataObjectToken(tt.token)
+			if tt.wantErr != "" {
+				require.Error(t, err)
+				assert.Contains(t, err.Error(), tt.wantErr)
+				assert.Empty(t, actual)
+				return
+			}
+
+			require.NoError(t, err)
+			assert.Equal(t, tt.expected, actual)
+		})
+	}
+}
+
+func TestClassifyDataObjectTokenParameterGroups(t *testing.T) {
+	groups := []string{
+		"component",
+		"base_extend",
+		"rated",
+		"setup",
+		"model",
+		"stable",
+		"craft",
+		"integrity",
+		"behavior",
+	}
+
+	for _, group := range groups {
+		t.Run(group, func(t *testing.T) {
+			tokens := []string{
+				"nspath.component." + group + ".attribute",
+				"grid.zone.station.nspath.component." + group + ".attribute",
+			}
+
+			for _, token := range tokens {
+				actual, err := ClassifyDataObjectToken(token)
+				require.NoError(t, err)
+				assert.Equal(t, constants.DataObjectTypeParameter, actual)
+			}
+		})
+	}
+}
--- a/model/measurement_attribute.go
+++ b/model/measurement_attribute.go
@ -0,0 +1,78 @@
+package model
+
+import (
+	"fmt"
+	"strings"
+
+	"modelRT/constants"
+	"modelRT/orm"
+)
+
+var allowedMeasurementTypes = map[string]struct{}{
+	"TM": {},
+	"TS": {},
+	"TC": {},
+	"TA": {},
+	"SP": {},
+}
+
+// MeasurementTypeFromDataSource returns the two-character measurement type
+// encoded in a CL3611 channel. Only TM, TS, TC, TA, and SP are valid.
+func MeasurementTypeFromDataSource(dataSource orm.JSONMap) (string, error) {
+	dataSourceType, err := integerJSONValue(dataSource["type"])
+	if err != nil {
+		return "", fmt.Errorf("invalid measurement data_source type: %w", err)
+	}
+	if dataSourceType != constants.DataSourceTypeCL3611 {
+		return "", fmt.Errorf("measurement type requires data_source type %d, got %d", constants.DataSourceTypeCL3611, dataSourceType)
+	}
+
+	ioAddress, ok := dataSource["io_address"].(map[string]any)
+	if !ok {
+		if value, jsonMapOK := dataSource["io_address"].(orm.JSONMap); jsonMapOK {
+			ioAddress = map[string]any(value)
+		} else {
+			return "", fmt.Errorf("measurement data_source io_address is not an object")
+		}
+	}
+
+	channel, ok := ioAddress["channel"].(string)
+	if !ok || len(channel) < 2 {
+		return "", fmt.Errorf("measurement data_source channel must contain at least two characters")
+	}
+
+	measurementType := strings.ToUpper(channel[:2])
+	if _, ok := allowedMeasurementTypes[measurementType]; !ok {
+		return "", fmt.Errorf("unsupported measurement type %q", measurementType)
+	}
+	return measurementType, nil
+}
+
+func integerJSONValue(value any) (int, error) {
+	switch typed := value.(type) {
+	case int:
+		return typed, nil
+	case int8:
+		return int(typed), nil
+	case int16:
+		return int(typed), nil
+	case int32:
+		return int(typed), nil
+	case int64:
+		return int(typed), nil
+	case float32:
+		converted := int(typed)
+		if typed != float32(converted) {
+			return 0, fmt.Errorf("expected integer, got %v", typed)
+		}
+		return converted, nil
+	case float64:
+		converted := int(typed)
+		if typed != float64(converted) {
+			return 0, fmt.Errorf("expected integer, got %v", typed)
+		}
+		return converted, nil
+	default:
+		return 0, fmt.Errorf("expected integer, got %T", value)
+	}
+}
--- a/model/measurement_attribute_test.go
+++ b/model/measurement_attribute_test.go
@ -0,0 +1,40 @@
+package model
+
+import (
+	"strings"
+	"testing"
+
+	"modelRT/orm"
+
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
+)
+
+func TestMeasurementTypeFromDataSource(t *testing.T) {
+	for _, measurementType := range []string{"TM", "TS", "TC", "TA", "SP"} {
+		t.Run(measurementType, func(t *testing.T) {
+			actual, err := MeasurementTypeFromDataSource(orm.JSONMap{
+				"type": float64(1),
+				"io_address": map[string]any{
+					"channel": strings.ToLower(measurementType) + "1_test",
+				},
+			})
+			require.NoError(t, err)
+			assert.Equal(t, measurementType, actual)
+		})
+	}
+}
+
+func TestMeasurementTypeFromDataSourceRejectsInvalidValues(t *testing.T) {
+	tests := []orm.JSONMap{
+		{"type": float64(2), "io_address": map[string]any{"channel": "tm1"}},
+		{"type": float64(1), "io_address": map[string]any{"channel": "xx1"}},
+		{"type": float64(1), "io_address": map[string]any{"channel": "t"}},
+		{"type": "1", "io_address": map[string]any{"channel": "tm1"}},
+	}
+
+	for _, dataSource := range tests {
+		_, err := MeasurementTypeFromDataSource(dataSource)
+		require.Error(t, err)
+	}
+}
--- a/model/measurement_identifier_test.go
+++ b/model/measurement_identifier_test.go
@ -0,0 +1,35 @@
+package model
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
+)
+
+func TestGenerateMeasureIdentifierSupportsJSONNumbers(t *testing.T) {
+	identifier, err := GenerateMeasureIdentifier(map[string]any{
+		"type": float64(2),
+		"io_address": map[string]any{
+			"station": "Station000",
+			"packet":  float64(10),
+			"offset":  float64(35),
+		},
+	})
+
+	require.NoError(t, err)
+	assert.Equal(t, "station000:104:10:35", identifier)
+}
+
+func TestGenerateMeasureIdentifierRejectsFractionalJSONNumbers(t *testing.T) {
+	_, err := GenerateMeasureIdentifier(map[string]any{
+		"type": float64(2),
+		"io_address": map[string]any{
+			"station": "station000",
+			"packet":  float64(10.5),
+			"offset":  float64(35),
+		},
+	})
+
+	require.Error(t, err)
+}
--- a/model/measurement_protol_model.go
+++ b/model/measurement_protol_model.go
@ -245,24 +245,18 @@ func GenerateMeasureIdentifier(source map[string]any) (string, error) {
 		if !ok {
 			return "", fmt.Errorf("Power104: missing packet field")
 		}
-		var packet int
-		switch v := packetVal.(type) {
-		case int:
-			packet = v
-		default:
-			return "", fmt.Errorf("Power104:invalid packet format")
+		packet, err := integerJSONValue(packetVal)
+		if err != nil {
+			return "", fmt.Errorf("Power104:invalid packet format: %w", err)
 		}

 		offsetVal, ok := ioAddress["offset"]
 		if !ok {
 			return "", fmt.Errorf("Power104:missing offset field")
 		}
-		var offset int
-		switch v := offsetVal.(type) {
-		case int:
-			offset = v
-		default:
-			return "", fmt.Errorf("Power104:invalid offset format")
+		offset, err := integerJSONValue(offsetVal)
+		if err != nil {
+			return "", fmt.Errorf("Power104:invalid offset format: %w", err)
 		}
 		return concatP104WithPlus(station, packet, offset), nil
 	default:
--- a/network/data_object_request.go
+++ b/network/data_object_request.go
@ -0,0 +1,7 @@
+// Package network define struct of network operation
+package network
+
+// DataObjectRecommendRequest defines the request payload for an data object recommend
+type DataObjectRecommendRequest struct {
+	Input string `form:"input,omitempty" example:"grid1"`
+}
--- a/network/measurement_request.go
+++ b/network/measurement_request.go
@ -6,8 +6,3 @@ type MeasurementGetRequest struct {
 	MeasurementID    int64  `json:"measurement_id" example:"1001"`
 	MeasurementToken string `json:"token" example:"some-token"`
 }
-
-// MeasurementRecommendRequest defines the request payload for an measurement recommend
-type MeasurementRecommendRequest struct {
-	Input string `form:"input,omitempty" example:"grid1"`
-}
--- a/network/response.go
+++ b/network/response.go
@ -22,13 +22,6 @@ type WSResponse struct {
 	Payload any    `json:"payload,omitempty" swaggertype:"object"`
 }

-// MeasurementRecommendPayload define struct of represents the data payload for the successful recommendation response.
-type MeasurementRecommendPayload struct {
-	Input           string   `json:"input" example:"transformfeeder1_220."`
-	Offset          int      `json:"offset" example:"21"`
-	RecommendedList []string `json:"recommended_list" example:"[\"I_A_rms\", \"I_B_rms\",\"I_C_rms\"]"`
-}
-
 // TargetResult define struct of target item in real time data subscription response payload
 type TargetResult struct {
 	ID   string `json:"id" example:"grid1.zone1.station1.ns1.tag1.transformfeeder1_220.I_A_rms"`
@ -41,3 +34,10 @@ type RealTimeSubPayload struct {
 	ClientID      string         `json:"client_id" example:"5d72f2d9-e33a-4f1b-9c76-88a44b9a953e" description:"用于标识不同client的监控请求ID"`
 	TargetResults []TargetResult `json:"targets"`
 }
+
+// DataObjectRecommendPayload define struct of represents the data payload for the successful recommendation response
+type DataObjectRecommendPayload struct {
+	Input           string   `json:"input" example:"transformfeeder1_220."`
+	Offset          int      `json:"offset" example:"21"`
+	RecommendedList []string `json:"recommended_list" example:"[\"I_A_rms\", \"I_B_rms\",\"I_C_rms\"]"`
+}
--- a/orm/async_task.go
+++ b/orm/async_task.go
@ -117,7 +117,7 @@ func (a *AsyncTask) IsFailed() bool {
 	return a.Status == AsyncTaskStatusFailed
 }

-// IsValidTaskType checks if the task type is valid
+// IsValidAsyncTaskType checks if the task type is valid
 func IsValidAsyncTaskType(taskType string) bool {
 	switch AsyncTaskType(taskType) {
 	case AsyncTaskTypeTopologyAnalysis, AsyncTaskTypePerformanceAnalysis,
--- a/orm/busbar_section.go
+++ b/orm/busbar_section.go
@ -91,10 +91,7 @@ func NewBusbarSection(name string) (*BusbarSection, error) {
 }

 func (b *BusbarSection) BusNameLenCheck() bool {
-	if len([]rune(b.BusbarName)) > 20 {
-		return false
-	}
-	return true
+	return len([]rune(b.BusbarName)) <= 20
 }

 func (b *BusbarSection) BusVoltageCheck() bool {
@ -105,8 +102,5 @@ func (b *BusbarSection) BusVoltageCheck() bool {
 }

 func (b *BusbarSection) BusDescLenCheck() bool {
-	if len([]rune(b.BusbarDesc)) > 100 {
-		return false
-	}
-	return true
+	return len([]rune(b.BusbarDesc)) <= 100
 }
--- a/orm/circuit_diagram_measurement.go
+++ b/orm/circuit_diagram_measurement.go
@ -9,18 +9,20 @@ import (

 // Measurement structure define abstracted info set of electrical measurement
 type Measurement struct {
-	ID            int64     `gorm:"column:id;primaryKey;autoIncrement"`
-	Tag           string    `gorm:"column:tag;size:64;not null;default:''"`
-	Name          string    `gorm:"column:name;size:64;not null;default:''"`
-	Type          int16     `gorm:"column:type;not null;default:-1"`
-	Size          int       `gorm:"column:size;not null;default:-1"`
-	DataSource    JSONMap   `gorm:"column:data_source;type:jsonb;not null;default:'{}'"`
-	EventPlan     JSONMap   `gorm:"column:event_plan;type:jsonb;not null;default:'{}'"`
-	Binding       JSONMap   `gorm:"column:binding;type:jsonb;not null;default:'{\"ct\":{\"ratio\":1.0,\"polarity\":1,\"index\":0},\"pt\":{\"ratio\":1.0,\"polarity\":1,\"index\":0}}'"`
-	BayUUID       uuid.UUID `gorm:"column:bay_uuid;type:uuid;not null"`
-	ComponentUUID uuid.UUID `gorm:"column:component_uuid;type:uuid;not null"`
-	Op            int       `gorm:"column:op;not null;default:-1"`
-	TS            time.Time `gorm:"column:ts;type:timestamptz;not null;default:CURRENT_TIMESTAMP"`
+	ID            int64        `gorm:"column:id;primaryKey;autoIncrement"`
+	Tag           string       `gorm:"column:tag;size:64;not null;default:'';uniqueIndex"`
+	Name          string       `gorm:"column:name;size:64;not null;default:''"`
+	Type          int16        `gorm:"column:type;not null;default:-1"`
+	Size          int          `gorm:"column:size;not null;default:-1"`
+	Mode          int16        `gorm:"column:mode;not null;default:1"`
+	Operations    JSONMapArray `gorm:"column:operations;type:jsonb[];not null;default:'{}'"`
+	DataSource    JSONMap      `gorm:"column:data_source;type:jsonb;not null;default:'{}'"`
+	EventPlan     JSONMap      `gorm:"column:event_plan;type:jsonb;not null;default:'{}'"`
+	Binding       JSONMap      `gorm:"column:binding;type:jsonb;not null;default:'{\"ct\":{\"ratio\":1.0,\"polarity\":1,\"index\":0},\"pt\":{\"ratio\":1.0,\"polarity\":1,\"index\":0}}'"`
+	BayUUID       uuid.UUID    `gorm:"column:bay_uuid;type:uuid;not null"`
+	ComponentUUID uuid.UUID    `gorm:"column:component_uuid;type:uuid;not null"`
+	Op            int          `gorm:"column:op;not null;default:-1"`
+	TS            time.Time    `gorm:"column:ts;type:timestamptz;not null;default:CURRENT_TIMESTAMP"`
 }

 // TableName func respresent return table name of Measurement
--- a/orm/jsonb_serializer.go
+++ b/orm/jsonb_serializer.go
@ -5,6 +5,9 @@ import (
 	"database/sql/driver"
 	"encoding/json"
 	"errors"
+	"fmt"
+
+	"github.com/jackc/pgx/v5/pgtype"
 )

 // JSONMap define struct of implements the sql.Scanner and driver.Valuer interfaces for handling JSONB fields
@ -36,3 +39,48 @@ func (j *JSONMap) Scan(value any) error {
 	}
 	return json.Unmarshal(source, j)
 }
+
+// JSONMapArray represents a PostgreSQL jsonb[] column.
+type JSONMapArray []JSONMap
+
+// Value encodes the slice as a PostgreSQL jsonb array.
+func (j JSONMapArray) Value() (driver.Value, error) {
+	items := make(pgtype.FlatArray[map[string]any], len(j))
+	for index, item := range j {
+		items[index] = map[string]any(item)
+	}
+	encoded, err := pgtype.NewMap().Encode(pgtype.JSONBArrayOID, pgtype.TextFormatCode, items, nil)
+	if err != nil {
+		return nil, fmt.Errorf("encode JSONMapArray: %w", err)
+	}
+	return string(encoded), nil
+}
+
+// Scan decodes a PostgreSQL jsonb array.
+func (j *JSONMapArray) Scan(value any) error {
+	if value == nil {
+		*j = nil
+		return nil
+	}
+
+	var source []byte
+	switch typedValue := value.(type) {
+	case []byte:
+		source = typedValue
+	case string:
+		source = []byte(typedValue)
+	default:
+		return fmt.Errorf("unsupported data type %T for JSONMapArray Scan", value)
+	}
+
+	var items pgtype.FlatArray[map[string]any]
+	if err := pgtype.NewMap().Scan(pgtype.JSONBArrayOID, pgtype.TextFormatCode, source, &items); err != nil {
+		return fmt.Errorf("decode JSONMapArray: %w", err)
+	}
+	result := make(JSONMapArray, len(items))
+	for index, item := range items {
+		result[index] = JSONMap(item)
+	}
+	*j = result
+	return nil
+}
--- a/orm/jsonb_serializer_test.go
+++ b/orm/jsonb_serializer_test.go
@ -0,0 +1,21 @@
+package orm
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/require"
+)
+
+func TestJSONMapArrayValueAndScan(t *testing.T) {
+	original := JSONMapArray{
+		{"command": float64(0), "timestamp": "2026-07-20T00:00:00Z"},
+		{"transaction": float64(1), "value": 15.2},
+	}
+
+	encoded, err := original.Value()
+	require.NoError(t, err)
+
+	var decoded JSONMapArray
+	require.NoError(t, decoded.Scan(encoded))
+	require.Equal(t, original, decoded)
+}
--- a/router/data_object.go
+++ b/router/data_object.go
@ -0,0 +1,17 @@
+// Package router provides router config
+package router
+
+import (
+	"modelRT/handler"
+
+	"github.com/gin-gonic/gin"
+)
+
+// registerDataObjectRoutes define func of register data object routes
+func registerDataObjectRoutes(rg *gin.RouterGroup, middlewares ...gin.HandlerFunc) {
+	g := rg.Group("/data-object/")
+	g.Use(middlewares...)
+	g.GET("attribute", handler.DataObjectAttributeQueryHandler)
+	g.PATCH("attribute", handler.DataObjectAttributeUpdateHandler)
+	g.GET("recommend", handler.DataObjectRecommendHandler)
+}
--- a/router/measurement.go
+++ b/router/measurement.go
@ -12,5 +12,4 @@ func registerMeasurementRoutes(rg *gin.RouterGroup, middlewares ...gin.HandlerFu
 	g := rg.Group("/measurement/")
 	g.Use(middlewares...)
 	g.GET("load", handler.MeasurementGetHandler)
-	g.GET("recommend", handler.MeasurementRecommendHandler)
 }
--- a/router/router.go
+++ b/router/router.go
@ -27,5 +27,6 @@ func RegisterRoutes(engine *gin.Engine, clientToken string) {
 	registerDataRoutes(routeGroup)
 	registerMonitorRoutes(routeGroup)
 	registerComponentRoutes(routeGroup, middleware.SetTokenMiddleware(clientToken))
+	registerDataObjectRoutes(routeGroup, middleware.SetTokenMiddleware(clientToken))
 	registerAsyncTaskRoutes(routeGroup, middleware.SetTokenMiddleware(clientToken))
 }
--- a/sql/data_object_measurement.go
+++ b/sql/data_object_measurement.go
@ -0,0 +1,100 @@
+// Package sql defines reusable database SQL statements.
+package sql
+
+const (
+	// MeasurementCountSelect selects the number of measurements matching a
+	// token hierarchy and is used during token existence validation.
+	MeasurementCountSelect = "SELECT COUNT(*)"
+
+	// MeasurementRowsSelect selects complete measurement rows after a token has
+	// been parsed into its hierarchy conditions.
+	MeasurementRowsSelect = "SELECT m.*"
+
+	// MeasurementLimitTwo limits token resolution to two rows so callers can
+	// distinguish a unique match from an ambiguous token without loading all matches.
+	MeasurementLimitTwo = "LIMIT 2"
+
+	// MeasurementIDWhere is the GORM condition used to query a measurement by
+	// its database primary key.
+	MeasurementIDWhere = "id = ?"
+
+	// MeasurementTokenValidationQueryBase contains the common hierarchy joins
+	// used by all supported measurement token formats.
+	MeasurementTokenValidationQueryBase = MeasurementCountSelect + `
+		FROM measurement AS m
+		INNER JOIN component AS c ON c.global_uuid = m.component_uuid
+		INNER JOIN bay AS b ON b.bay_uuid = m.bay_uuid
+		INNER JOIN station AS s ON s.id = c.station_id
+		INNER JOIN zone AS z ON z.id = s.zone_id
+		INNER JOIN grid AS g ON g.id = z.grid_id`
+
+	// MeasurementSevenPartTokenWhere matches a complete token in the form
+	// token1.token2.token3.token4.token5.token6.token7. Token6 is validated as
+	// "bay" before this condition is used.
+	MeasurementSevenPartTokenWhere = `WHERE g.tagname = ?
+  		AND z.tagname = ? AND s.tagname = ?
+  		AND c.nspath = ? AND c.tag = ?
+  		AND m.tag = ?`
+
+	// MeasurementFourPartTokenWhere matches a local measurement token in the
+	// form token4.token5.token6.token7. Token6 is validated as "bay" before use.
+	MeasurementFourPartTokenWhere = `WHERE c.nspath = ? AND c.tag = ?
+  		AND m.tag = ?`
+
+	// MeasurementTwoPartTokenWhere matches the short measurement token format
+	// token4.token7 using component namespace path and measurement tag.
+	MeasurementTwoPartTokenWhere = `WHERE c.nspath = ? AND m.tag = ?`
+
+	// MeasurementComponentByUUID returns the component hierarchy fields needed
+	// to construct a measurement's canonical name and seven-part ID.
+	MeasurementComponentByUUID = `SELECT global_uuid, nspath, 
+		tag, grid, zone, station FROM component
+		WHERE global_uuid = ? LIMIT 1`
+
+	// MeasurementGridTags returns every grid tag used to construct the first
+	// level of the measurement recommendation hierarchy.
+	MeasurementGridTags = `SELECT tagname FROM grid`
+
+	// MeasurementZoneHierarchy returns zones together with their parent grid
+	// tags for building the grid-to-zone recommendation mapping.
+	MeasurementZoneHierarchy = `SELECT zone.*, 
+		grid.tagname AS grid_tag FROM zone
+		LEFT JOIN grid ON zone.grid_id = grid.id`
+
+	// MeasurementStationHierarchy returns stations together with their parent
+	// zone tags for building the zone-to-station recommendation mapping.
+	MeasurementStationHierarchy = `SELECT station.*, zone.tagname AS zone_tag
+		FROM station
+		LEFT JOIN zone ON station.zone_id = zone.id`
+
+	// MeasurementComponentHierarchy returns components together with their
+	// parent station tags for building station, namespace, and component mappings.
+	MeasurementComponentHierarchy = `SELECT component.*, 
+		station.tagname AS station_tag 
+		FROM component LEFT JOIN station 
+		ON component.station_id = station.id`
+
+	// MeasurementTagHierarchy returns measurements together with their owning
+	// component tags for building the component-to-measurement mapping.
+	MeasurementTagHierarchy = `
+    SELECT measurement.*,
+        component.tag AS comp_tag,
+        component.nspath AS comp_nspath,
+        bay.tag AS bay_tag
+    FROM measurement
+    LEFT JOIN component
+        ON measurement.component_uuid = component.global_uuid
+    LEFT JOIN bay
+        ON measurement.bay_uuid = bay.bay_uuid`
+
+	// MeasurementBayLinkedComponentTags returns components that have at least
+	// one measurement whose bay_uuid resolves to an existing bay record.
+	MeasurementBayLinkedComponentTags = `
+    SELECT DISTINCT component.tag AS comp_tag
+    FROM component
+    INNER JOIN measurement
+        ON component.global_uuid = measurement.component_uuid
+    INNER JOIN bay
+        ON measurement.bay_uuid = bay.bay_uuid
+    WHERE component.tag <> ''`
+)
--- a/sql/data_object_parameter.go
+++ b/sql/data_object_parameter.go
@ -0,0 +1,50 @@
+// Package sql defines reusable database SQL statements.
+package sql
+
+const (
+	// ParameterComponentQueryBase selects the component owning a parameter and
+	// joins its complete hierarchy so seven-part tokens can be validated as one path.
+	ParameterComponentQueryBase = `SELECT c.*
+		FROM component AS c
+		INNER JOIN station AS s ON s.id = c.station_id
+		INNER JOIN zone AS z ON z.id = s.zone_id
+		INNER JOIN grid AS g ON g.id = z.grid_id`
+
+	// ParameterSevenPartTokenWhere matches the complete parameter token prefix
+	// token1.token2.token3.token4.token5.
+	ParameterSevenPartTokenWhere = `WHERE g.tagname = ?
+		AND z.tagname = ?
+		AND s.tagname = ?
+		AND c.nspath = ?
+		AND c.tag = ?`
+
+	// ParameterFourPartTokenWhere matches token4.token5 and restricts the short
+	// token form to components belonging to a local station.
+	ParameterFourPartTokenWhere = `WHERE c.nspath = ?
+		AND c.tag = ?
+		AND s.is_local = TRUE`
+
+	// ParameterLimitTwo allows callers to distinguish a unique component from
+	// an ambiguous token without loading every matching row.
+	ParameterLimitTwo = `LIMIT 2`
+
+	// ParameterAttributeColumnType checks that token7 is an actual column of
+	// the dynamic parameter table and returns its PostgreSQL display type.
+	ParameterAttributeColumnType = `SELECT pg_catalog.format_type(a.atttypid, a.atttypmod)
+		FROM pg_catalog.pg_attribute AS a
+		INNER JOIN pg_catalog.pg_class AS c ON c.oid = a.attrelid
+		INNER JOIN pg_catalog.pg_namespace AS n ON n.oid = c.relnamespace
+		WHERE n.nspname = 'public'
+		AND c.relname = ?
+		AND a.attname = ?
+		AND a.attnum > 0
+		AND NOT a.attisdropped
+		LIMIT 1`
+
+	// ParameterAttributeDescription returns the display name of token7 from the
+	// basic attribute metadata table. Two rows are enough to detect ambiguity.
+	ParameterAttributeDescription = `SELECT attribute_name
+		FROM basic.attribute
+		WHERE attribute = ?
+		LIMIT 2`
+)
--- a/sql/topologic.go
+++ b/sql/topologic.go
@ -2,7 +2,7 @@
 package sql

 // RecursiveSQL define topologic table recursive query statement
-var RecursiveSQL = `WITH RECURSIVE recursive_tree as (
+const RecursiveSQL = `WITH RECURSIVE recursive_tree as (
 	SELECT uuid_from,uuid_to,flag
 	FROM "topologic"
 	WHERE uuid_from = ?
@ -16,7 +16,7 @@ var RecursiveSQL = `WITH RECURSIVE recursive_tree as (
 // RecursiveTopologicByStartSQL returns every directed edge reachable from the
 // supplied start component. It tracks the visited node path inside PostgreSQL
 // so cycles in topologic data cannot recurse forever.
-var RecursiveTopologicByStartSQL = `WITH RECURSIVE recursive_tree as (
+const RecursiveTopologicByStartSQL = `WITH RECURSIVE recursive_tree as (
 	SELECT uuid_from, uuid_to, flag, ARRAY[uuid_from, uuid_to] AS path
 	FROM "topologic"
 	WHERE uuid_from = ?