The constants for unique identifiers for the concepts that identify data types are as follows:
CANONICAL_DATA_TYPE_ID_Boolean
CANONICAL_DATA_TYPE_ID_Date
CANONICAL_DATA_TYPE_ID_DateTime
CANONICAL_DATA_TYPE_ID_Double
CANONICAL_DATA_TYPE_ID_Duration
CANONICAL_DATA_TYPE_ID_Float
CANONICAL_DATA_TYPE_ID_Integer
CANONICAL_DATA_TYPE_ID_ObjectRef
CANONICAL_DATA_TYPE_ID_String
CANONICAL_DATA_TYPE_ID_Time
CANONICAL_DATA_TYPE_ID_URI