Returns the value of IsDefinedBy attribute. This attribute represents a set of relationships to property set definitions that are attached to this context. Those statically or dynamically defined properties contain alphanumeric information content that further defines the context.
Parameters
Parameters
Description
IsDefinedBy
[out] Receives the value of IsDefinedBy attribute.
Remarks
IFC4 CHANGE: The data type has been changed from IfcRelDefines to IfcRelDefinesByProperties with upward compatibility for file-based exchange.