Object type names are contained in the Xrecord or Object Data key required field. Values from this key field are displayed in the upper part of the ODCLASS_PROPERTIES window.
Object type names are used by ODCLASS as object type identifiers for graphic elements. The object type identifiers occurs on the graphic elements after attaching Xrecord or Object Data to it.
A single graphic element can be defined as multiple objects of different types - by the number of different Xrecord or Object Data attached to it.
Object type names from the upper part of the ODCLASS_PROPERTIES window can be copied Ctrl + C.
See more fully in:
ODCLASS_description_en.htm,
ODCLASS_definition_file_structure_R-4.htm