diff --git a/model/ddl.sql b/model/ddl.sql
index c727eff..ddd8514 100644
--- a/model/ddl.sql
+++ b/model/ddl.sql
@@ -117,7 +117,7 @@ CREATE TABLE PUBLIC.BAY (
     GRID VARCHAR(64) NOT NULL DEFAULT '',
     ZONE VARCHAR(64) NOT NULL DEFAULT '',
     STATION VARCHAR(64) NOT NULL DEFAULT '',
-    BUSINESS JSONB NOT NULL DEFAULT '{}', -- {'unom':0.0,'bus_connected':''}
+    BUSINESS JSONB NOT NULL DEFAULT '{}', -- {"unom":0.0,"bus_connected":""}
   	FROM_UUIDS JSONB NOT NULL DEFAULT '[]', -- uuids
   	TO_UUIDS JSONB NOT NULL DEFAULT '[]', -- uuids
     DEV_PROTECT JSONB NOT NULL DEFAULT '[]', -- devices
@@ -135,7 +135,7 @@ CREATE TABLE PUBLIC.MEASUREMENT (
     TAG VARCHAR(64) NOT NULL DEFAULT '',
     NAME VARCHAR(64) NOT NULL DEFAULT '',
     TYPE SMALLINT NOT NULL DEFAULT -1,
-    DATA_SOURCE JSONB NOT NULL DEFAULT '{}', -- {'type':,'main_pos':'','sub_pos':''}
+    DATA_SOURCE JSONB NOT NULL DEFAULT '{}', -- {"type":1,"main_pos":"","sub_pos":""}
     SIZE INTEGER NOT NULL DEFAULT -1,
     BAY_ID BIGINT NOT NULL,
     COMPONENT_ID BIGINT NOT NULL,
diff --git a/model/ddl_4_bay.sql b/model/ddl_4_bay.sql
index 830ba40..ae85d81 100644
--- a/model/ddl_4_bay.sql
+++ b/model/ddl_4_bay.sql
@@ -15,7 +15,7 @@ CREATE TABLE PUBLIC.BAY (
     GRID VARCHAR(64) NOT NULL DEFAULT '',
     ZONE VARCHAR(64) NOT NULL DEFAULT '',
     STATION VARCHAR(64) NOT NULL DEFAULT '',
-    BUSINESS JSONB NOT NULL DEFAULT '{}', -- {'unom':0.0,'bus_connected':''}
+    BUSINESS JSONB NOT NULL DEFAULT '{}', -- {"unom":0.0,"bus_connected":""}
   	FROM_UUIDS JSONB NOT NULL DEFAULT '[]', -- uuids
   	TO_UUIDS JSONB NOT NULL DEFAULT '[]', -- uuids
     DEV_PROTECT JSONB NOT NULL DEFAULT '[]', -- devices
diff --git a/model/ddl_5_measurement.sql b/model/ddl_5_measurement.sql
index f96d804..cca9fd8 100644
--- a/model/ddl_5_measurement.sql
+++ b/model/ddl_5_measurement.sql
@@ -7,7 +7,7 @@ CREATE TABLE PUBLIC.MEASUREMENT (
     TAG VARCHAR(64) NOT NULL DEFAULT '',
     NAME VARCHAR(64) NOT NULL DEFAULT '',
     TYPE SMALLINT NOT NULL DEFAULT -1,
-    DATA_SOURCE JSONB NOT NULL DEFAULT '{}', -- {'type':,'main_pos':'','sub_pos':''}
+    DATA_SOURCE JSONB NOT NULL DEFAULT '{}', -- {"type":1,"main_pos":"","sub_pos":""}
     SIZE INTEGER NOT NULL DEFAULT -1,
     BAY_ID INTEGER NOT NULL DEFAULT -1,
     COMPONENT_ID INTEGER NOT NULL DEFAULT -1,