diff --git a/base_model/ddl.sql b/base_model/ddl.sql
index bb2c6cb..ff7e036 100644
--- a/base_model/ddl.sql
+++ b/base_model/ddl.sql
@@ -11,7 +11,6 @@ CREATE SCHEMA IF NOT EXISTS BASIC;
 -- DROP TABLE IF EXISTS BASIC.MODEL_GROUP;
 -- DROP TABLE IF EXISTS BASIC.MODEL_TYPE;
 -- DROP TABLE IF EXISTS BASIC.ATTRIBUTE_GROUP;
--- DROP TABLE IF EXISTS BASIC.COMPONENT_TYPE;
 -- DROP TABLE IF EXISTS BASIC.DATA_TYPE;
 
 
@@ -23,15 +22,6 @@ CREATE TABLE BASIC.DATA_TYPE (
 	UNIQUE (DATA_TYPE)
 );
 
-CREATE TABLE BASIC.COMPONENT_TYPE (
-    ID BIGSERIAL PRIMARY KEY,
-    TYPE VARCHAR(64) NOT NULL DEFAULT '',
-    NAME VARCHAR(64) NOT NULL DEFAULT '',
-	CONFIG JSONB NOT NULL DEFAULT '{}',
-
-    UNIQUE (TYPE)
-);
-
 CREATE TABLE BASIC.ATTRIBUTE_GROUP (
 	ID BIGSERIAL PRIMARY KEY,
 	GROUP_TYPE VARCHAR(64) NOT NULL DEFAULT '',
@@ -52,7 +42,7 @@ CREATE TABLE BASIC.MODEL_TYPE (
 	
 	UNIQUE (MODEL_TYPE),
 
-	FOREIGN KEY (GRAPHIC_ELEMENT) REFERENCES BASIC.COMPONENT_TYPE (ID)
+	FOREIGN KEY (GRAPHIC_ELEMENT) REFERENCES PUBLIC.COMPONENT_TYPE (ID)
 );
 
 CREATE TABLE BASIC.MODEL_GROUP (
diff --git a/base_model/dml.sql b/base_model/dml.sql
index f234c25..0b439ff 100644
--- a/base_model/dml.sql
+++ b/base_model/dml.sql
@@ -40,23 +40,3 @@ VALUES
 	('JSON','postrges'),
 	('JSONB','postgres'),
 	('polar_coordinates','postgres');
-
-
--- supported standard component type
-INSERT INTO 
-	BASIC.COMPONENT_TYPE (TYPE, NAME, CONFIG)
-VALUES
-	('bus','母线段','{}'),
-	('asyncmotor','异步电动机','{}'),
-	('cb','断路器','{}'),
-	('ct','电流互感器','{}'),
-	('pt','电压互感器','{}'),
-	('es','接地开关','{}'),
-	('fes','快速接地开关','{}'),
-	('cable','电缆','{}'),
-	('ds','隔离开关','{}'),
-	('dteds','双掷接地隔离开关','{}'),
-	('potential_indicator','带电指示器','{}'),
-	('lightning_arrester','避雷器','{}'),
-	('cable_termination','电缆出线套筒','{}'),
-	('cable_end','电缆端','{}');
\ No newline at end of file
diff --git a/model/ddl_0_component_type.sql b/model/ddl_0_component_type.sql
new file mode 100644
index 0000000..29f150b
--- /dev/null
+++ b/model/ddl_0_component_type.sql
@@ -0,0 +1,32 @@
+-- standard component type 
+
+-- DROP TABLE IF EXISTS PUBLIC.COMPONENT_TYPE;
+
+CREATE TABLE PUBLIC.COMPONENT_TYPE (
+    ID SERIAL PRIMARY KEY,
+    TYPE VARCHAR(64) NOT NULL DEFAULT '',
+    NAME VARCHAR(64) NOT NULL DEFAULT '',
+    CONFIG JSONB NOT NULL DEFAULT '{}',
+
+    UNIQUE (TYPE)
+);
+
+
+-- supported standard component type
+INSERT INTO 
+	PUBLIC.COMPONENT_TYPE (TYPE, NAME, CONFIG)
+VALUES
+	('bus','母线段','{}'),
+	('asyncmotor','异步电动机','{}'),
+	('cb','断路器','{}'),
+	('ct','电流互感器','{}'),
+	('pt','电压互感器','{}'),
+	('es','接地开关','{}'),
+	('fes','快速接地开关','{}'),
+	('cable','电缆','{}'),
+	('ds','隔离开关','{}'),
+	('dteds','双掷接地隔离开关','{}'),
+	('potential_indicator','带电指示器','{}'),
+	('lightning_arrester','避雷器','{}'),
+	('cable_termination','电缆出线套筒','{}'),
+	('cable_end','电缆端','{}');
\ No newline at end of file