OptionalextensionThe objectId of the extension dictionary owned by the object. If the object does not own an extension dictionary, then the returned objectId is set to undefined.
OptionalobjectUnique identifier for the object
OptionalownerIdentifier of the object that owns this object
Interface defining the attributes that can be associated with an AcDbObject.
Extends the base AcCmAttributes interface and adds object-specific attributes like objectId and ownerId.