When you delete an object type, all objects of that type are also deleted (unless any objects are Grouping objects that contain objects of a different object type). You can delete an object type from your information catalog by using the Information Catalog Manager windows or tag language.
The Delete window opens.
When you delete an object type, the Information Catalog Manager closes all windows that are directly related to that object type.
Enter the following lines in your tag language file:
:ACTION.OBJTYPE(DELETE_EXT) :OBJECT.TYPE(short_name_of_object_type)
After each keyword, type an appropriate value within the parentheses: