IfcProperty 12006

[aothms]

Rename the attribute for compatibility of facilitating 12006

[aothms]

--- tmp/a/IFC.exp	2022-02-13 13:50:14.000908700 +0100
+++ tmp/b/IFC.exp	2022-03-22 21:17:33.080403300 +0100
@@ -9029,21 +9029,21 @@
 (PredefinedType <> IfcProjectionElementTypeEnum.USERDEFINED) OR
 ((PredefinedType = IfcProjectionElementTypeEnum.USERDEFINED) AND EXISTS(SELF\IfcObject.ObjectType));
 END_ENTITY;
 
 ENTITY IfcProperty
  ABSTRACT SUPERTYPE OF (ONEOF
 	(IfcComplexProperty
 	,IfcSimpleProperty))
  SUBTYPE OF (IfcPropertyAbstraction);
 	Name : IfcIdentifier;
-	Description : OPTIONAL IfcText;
+	Specification : OPTIONAL IfcText;
  INVERSE
 	PartOfPset : SET [0:?] OF IfcPropertySet FOR HasProperties;
 	PropertyForDependance : SET [0:?] OF IfcPropertyDependencyRelationship FOR DependingProperty;
 	PropertyDependsOn : SET [0:?] OF IfcPropertyDependencyRelationship FOR DependantProperty;
 	PartOfComplex : SET [0:?] OF IfcComplexProperty FOR HasProperties;
 	HasConstraints : SET [0:?] OF IfcResourceConstraintRelationship FOR RelatedResourceObjects;
 	HasApprovals : SET [0:?] OF IfcResourceApprovalRelationship FOR RelatedResourceObjects;
 END_ENTITY;
 
 ENTITY IfcPropertyAbstraction