IfcRelAssociates

Item	SPF	XML	Change	Description
IFC2x3 to IFC4 4.0.0.0
IfcRelAssociates			MODIFIED	Instantiation changed to ABSTRACT.

Semantic definitions at the entity

Entity definition

The association relationship IfcRelAssociates refers to sources of information (most notably a classification, library, document, approval, contraint, or material). The information associated may reside internally or externally of the project data. There is no dependency implied by the association.

EXAMPLE Further external information may be provided to the tank equipment (as subtype of IfcProduct) in terms of its classification and instruction documents, the source of the additional information is held external to the project data model.

Association relationships can be established to objects (occurrences as subtypes of IfcObject) or to types (as subtypes of IfcTypeObject). Some associations (such as approval, or document) may also be applied to property templates (as subtypes of IfcPropertyDefinition).

EXAMPLE The classification information for the storage tank equipment may be associated to the IfcTankType (subtype of IfcTypeObject), defining the specific information for all occurencies of that tank in the project. Therefore the association of the Uniclass notation 'L6814' may be associated by a subtype of IfcRelAssociates to the type information.

EXAMPLE The classification information for a particular space within a building may be associated to the IfcSpace object (subtype of IfcObject), defining a particular occurrence of space. Therefore the association of the DIN notation 'NF 1.5' may be associated by a subtype of IfcRelAssociates to the object.

The association relationship establishs an association between one to many objects or property templates and the associated information. The subtypes of IfcRelAssociates establish the particular semantic meaning of the association relationship.

HISTORY New entity in IFC2x.

IFC4 CHANGE Entity has been changed into an ABSTRACT supertype

Attribute definitions

#	Attribute	Type	Cardinality	Description	G
5	RelatedObjects	IfcDefinitionSelect	S[1:?]	Set of object or property definitions to which the external references or information is associated. It includes object and type objects, property set templates, property templates and property sets and contexts. IFC4 CHANGE The attribute datatype has been changed from IfcRoot to IfcDefinitionSelect.	X

Inherited definitions from supertypes

Entity inheritance

Attribute inheritance

#	Attribute	Type	Cardinality	Description	G
IfcRoot
1	GlobalId	IfcGloballyUniqueId		Assignment of a globally unique identifier within the entire software world.	X
2	OwnerHistory	IfcOwnerHistory	?	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 - either as addition, deletion or modification. IFC4 CHANGE The attribute has been changed to be OPTIONAL.	X
3	Name	IfcLabel	?	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	?	Optional description, provided for exchanging informative comments.	X
IfcRelationship
IfcRelAssociates
5	RelatedObjects	IfcDefinitionSelect	S[1:?]	Set of object or property definitions to which the external references or information is associated. It includes object and type objects, property set templates, property templates and property sets and contexts. IFC4 CHANGE The attribute datatype has been changed from IfcRoot to IfcDefinitionSelect.	X

#	Concept	Template	Model View
IfcRoot
	Identity	Software Identity	General Usage
	Revision Control	Revision Control	General Usage

Formal representations

XML Specification

 <xs:element name="IfcRelAssociates" type="ifc:IfcRelAssociates" abstract="true" substitutionGroup="ifc:IfcRelationship" nillable="true"/>

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

  <xs:complexContent>

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

    <xs:sequence>

     <xs:element name="RelatedObjects">

      <xs:complexType>

       <xs:group ref="ifc:IfcDefinitionSelect" maxOccurs="unbounded"/>

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

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

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

      </xs:complexType>

     </xs:element>

    </xs:sequence>

   </xs:extension>

  </xs:complexContent>

 </xs:complexType>

EXPRESS Specification


ENTITY IfcRelAssociates

 ABSTRACT SUPERTYPE OF(ONEOF(IfcRelAssociatesApproval, IfcRelAssociatesClassification, IfcRelAssociatesConstraint, IfcRelAssociatesDataset, IfcRelAssociatesDocument, IfcRelAssociatesLibrary, IfcRelAssociatesMaterial, IfcRelAssociatesProfileDef))

 SUBTYPE OF (IfcRelationship);

  RelatedObjects : SET [1:?] OF IfcDefinitionSelect;

END_ENTITY;

 EXPRESS-G diagram

	Ordnet zu - Relation
	Rel Associates
	Association

IfcRelAssociates

Semantic definitions at the entity

Inherited definitions from supertypes

Definitions applying to General Usage

Formal representations