Modeler: 9/DataType
From CaseTalk Wiki
DataType definition is available since CaseTalk Modeler 9.3. It allows modelers to add datatype names in the Label Type property dialog which are unknown to CaseTalk itself.
The Data Type window (located under the main menu \ tools) shows the data type hierarchy native in CaseTalk, the custom data types, and data types available under various technical artifacts.
The user interface works entire using drag and drop functionality.