IFC 4.3.x development

8.16.3.2 IfcExtendedProperties

Change log

IFC4

added

8.16.3.2.1 Semantic definitions at the entity

The IfcExtendedProperties is an abstract supertype of all extensible property collections that are applicable to certain characterized entities. Instantiable subtypes of IfcExtendedProperties assign the property collection to a particular characterized entity.

NOTE  Extensible property collections are provided for materials and profiles.

Instantiable subtypes have a set of Properties, each providing property name, value and unit and other instance information, depending on the subtype of IfcProperty referenced.

HISTORY  New entity in IFC4.

8.16.3.2.1 Attributes

# Attribute Type Description
IfcPropertyAbstraction
HasExternalReferencesSET [0:?] OF IfcExternalReferenceRelationship FOR RelatedResourceObjectsReference to an external reference, e.g. library, classification, or document information, that is associated to the property definition.

> IFC4 CHANGE New inverse attribute.
IfcExtendedProperties
1 Name OPTIONAL IfcIdentifier The name given to the set of properties.
2 Description OPTIONAL IfcText Description for the set of properties.
3 Properties SET [1:?] OF IfcProperty The set of properties provided for this extended property collection.

8.16.3.2.2 Entity inheritance

dot_inheritance IfcMaterialProperties IfcMaterialProperties IfcExtendedProperties IfcExtendedProperties IfcMaterialProperties->IfcExtendedProperties IfcPropertyAbstraction IfcPropertyAbstraction IfcExtendedProperties->IfcPropertyAbstraction IfcProfileProperties IfcProfileProperties IfcProfileProperties->IfcExtendedProperties IfcPropertyAbstraction_children 3 more... IfcPropertyAbstraction_children->IfcPropertyAbstraction

8.16.3.2.3 Formal representations

ENTITY IfcExtendedProperties
 ABSTRACT SUPERTYPE OF (ONEOF
	(IfcMaterialProperties
	,IfcProfileProperties))
 SUBTYPE OF (IfcPropertyAbstraction);
	Name : OPTIONAL IfcIdentifier;
	Description : OPTIONAL IfcText;
	Properties : SET [1:?] OF IfcProperty;
END_ENTITY;