Specifies the dobj ID equivalent to this CMSObject object. You can use this ID with the Arbortext Command Language (ACL) programming language. If this object is no longer valid, the attribute value will be 0 (an invalid dobj ID).

Each access returns a new dobj ID. The caller is responsible for calling the ACL dobj_close() function on each returned valid ID. Calling dobj_close() does not affect the original CMSObject or the IDs returned previously.