IfcComplexProperty

Semantic definitions at the entity

Entity definition

IfcComplexProperty is used to define complex properties to be handled completely within a property set. The included set of properties may be a mixed or consistent collection of IfcProperty subtypes. This enables the definition of a set of properties to be included as a single 'property' entry in an IfcPropertySet. The definition of such an IfcComplexProperty can be reused in many different IfcPropertySet's.

NOTE Since an IfcComplexProperty may contain other complex properties, sets of properties can be nested. This nesting may be restricted by view definitions and implementer agreements.

HISTORY New entity in IFC2.0.

Attribute definitions

#	Attribute	Type	Cardinality	Description	G
3	UsageName	IfcIdentifier		Usage description of the IfcComplexProperty within the property set which references the IfcComplexProperty. NOTE Consider a complex property for glazing properties. The Name attribute of the IfcComplexProperty could be Pset_GlazingProperties, and the UsageName attribute could be OuterGlazingPane.	X
4	HasProperties	IfcProperty	S[1:?]	Set of properties that can be used within this complex property (may include other complex properties).	X

Formal Propositions

Rule	Description
WR21	The IfcComplexProperty should not reference itself within the list of HasProperties.
WR22	Each property within the complex property shall have a unique name attribute.

Inherited definitions from supertypes

Entity inheritance

Attribute inheritance

#	Attribute	Type	Cardinality	Description	G
IfcPropertyAbstraction
	HasExternalReferences	IfcExternalReferenceRelationship @RelatedResourceObjects	S[0:?]	Reference to an external reference, e.g. library, classification, or document information, that is associated to the property definition. IFC4 CHANGE New inverse attribute.	X
IfcProperty
1	Name	IfcIdentifier		Name for this property. This label is the significant name string that defines the semantic meaning for the property.	X
2	Description	IfcText	?	Informative text to explain the property.	X
	PartOfPset	IfcPropertySet @HasProperties	S[0:?]	Reference to the IfcPropertySet by which the IfcProperty is referenced. IFC4 CHANGE New inverse attribute to navigate from IfcProperty to IfcPropertySet with upward compatibility for file based exchange.	X
	PropertyForDependance	IfcPropertyDependencyRelationship @DependingProperty	S[0:?]	The property on whose value that of another property depends.	X
	PropertyDependsOn	IfcPropertyDependencyRelationship @DependantProperty	S[0:?]	The relating property on which the value of the property depends.	X
	PartOfComplex	IfcComplexProperty @HasProperties	S[0:?]	Reference to the IfcComplexProperty in which the IfcProperty is contained. IFC4 CHANGE The cardinality has changed to 0..n to allow reuse of instances of IfcProperty in several IfcComplexProperty with upward compatibility for file based exchange.	X
	HasConstraints	IfcResourceConstraintRelationship @RelatedResourceObjects	? S[0:?]	User-defined constraints for the property.	X
	HasApprovals	IfcResourceApprovalRelationship @RelatedResourceObjects	? S[0:?]	User-defined approvals for the property.	X
IfcComplexProperty
3	UsageName	IfcIdentifier		Usage description of the IfcComplexProperty within the property set which references the IfcComplexProperty. NOTE Consider a complex property for glazing properties. The Name attribute of the IfcComplexProperty could be Pset_GlazingProperties, and the UsageName attribute could be OuterGlazingPane.	X
4	HasProperties	IfcProperty	S[1:?]	Set of properties that can be used within this complex property (may include other complex properties).	X

Formal representations

XML Specification

 <xs:element name="IfcComplexProperty" type="ifc:IfcComplexProperty" substitutionGroup="ifc:IfcProperty" nillable="true"/>

 <xs:complexType name="IfcComplexProperty">

  <xs:complexContent>

   <xs:extension base="ifc:IfcProperty">

    <xs:sequence>

     <xs:element name="HasProperties">

      <xs:complexType>

       <xs:sequence>

        <xs:element ref="ifc:IfcProperty" maxOccurs="unbounded"/>

       </xs:sequence>

       <xs:attribute ref="ifc:itemType" fixed="ifc:IfcProperty"/>

       <xs:attribute ref="ifc:cType" fixed="set"/>

       <xs:attribute ref="ifc:arraySize" use="optional"/>

      </xs:complexType>

     </xs:element>

    </xs:sequence>

    <xs:attribute name="UsageName" type="ifc:IfcIdentifier" use="optional"/>

   </xs:extension>

  </xs:complexContent>

 </xs:complexType>

EXPRESS Specification


ENTITY IfcComplexProperty

 SUBTYPE OF (IfcProperty);

  UsageName : IfcIdentifier;

  HasProperties : SET [1:?] OF IfcProperty;

 WHERE

  WR21 : SIZEOF(QUERY(temp <* HasProperties | SELF :=: temp)) = 0;
  WR22 : IfcUniquePropertyName(HasProperties);
END_ENTITY;

 EXPRESS-G diagram

Item	SPF	XML	Change	Description
IFC4 Addendum 1
IfcComplexProperty
HasConstraints			ADDED
HasApprovals			ADDED

	Komplexes Merkmal
	Complex Property
	Propriété complexe