IfcPropertyDefinition

Semantic definitions at the entity

Entity definition

The IfcPropertyDefinition defines the generalization of all characteristics (i.e. a grouping of individual properties), that may be assigned to objects. Currently, subtypes of IfcPropertyDefinition include property set definitions, and property sets..

Property definitions define information that is shared among multiple instances of objects. The assignment of the shared information to objects is handled by the IfcRelDefines relationship.

HISTORY New Entity in IFC Release 2.0

Attribute definitions

#	Attribute	Type	Cardinality	Description	A
	HasAssociations	IfcRelAssociates @RelatedObjects	S[0:?]	Reference to the relationship IfcRelAssociates and thus to those externally defined concepts, like classifications, documents, or library information, which are associated to the property definition.

Inherited definitions from supertypes

Entity inheritance

Attribute inheritance

#	Attribute	Type	Cardinality	Description	A
IfcRoot
1	GlobalId	IfcGloballyUniqueId	[1:1]	Assignment of a globally unique identifier within the entire software world.	X
2	OwnerHistory	IfcOwnerHistory	[1:1]	Assignment of the information about the current ownership of that object, including owning actor, application, local identification and information captured about the recent changes of the object, NOTE: only the last modification in stored.	X
3	Name	IfcLabel	[0:1]	Optional name for use by the participating software systems or users. For some subtypes of IfcRoot the insertion of the Name attribute may be required. This would be enforced by a where rule.	X
4	Description	IfcText	[0:1]	Optional description, provided for exchanging informative comments.	X
IfcPropertyDefinition
	HasAssociations	IfcRelAssociates @RelatedObjects	S[0:?]	Reference to the relationship IfcRelAssociates and thus to those externally defined concepts, like classifications, documents, or library information, which are associated to the property definition.

Formal representations

XSD Specification

 <xs:element name="IfcPropertyDefinition" type="ifc:IfcPropertyDefinition" abstract="true" substitutionGroup="ifc:IfcRoot" nillable="true"/>

 <xs:complexType name="IfcPropertyDefinition" abstract="true">

  <xs:complexContent>

   <xs:extension base="ifc:IfcRoot"/>

  </xs:complexContent>

 </xs:complexType>

EXPRESS Specification


ENTITY IfcPropertyDefinition

 ABSTRACT SUPERTYPE OF(IfcPropertySetDefinition)

 SUBTYPE OF (IfcRoot);

 INVERSE

  HasAssociations : SET [0:?] OF IfcRelAssociates FOR RelatedObjects;

END_ENTITY;

 EXPRESS-G diagram