Returns the value of IsDeclaredBy attribute. This attribute represents link to the relationship object pointing to the declaring object that provides the object definitions for this object occurrence. The declaring object has to be part of an object type decomposition. The associated IfcObject, or its subtypes, contains the specific information (as part of a type, or style, definition), that is common to all reflected instances of the declaring IfcObject, or its subtypes.

IFC4 CHANGE: New inverse relationship, change made with upward compatibility for file-based exchange.