IfcRelServicesBuildings

Item	SPF	XML	Change	Description
IFC2x3 to IFC4
IfcRelServicesBuildings
OwnerHistory			MODIFIED	Instantiation changed to OPTIONAL.
RelatedBuildings	X	X	MODIFIED	Type changed from IfcSpatialStructureElement to IfcSpatialElement.

Semantic definitions at the entity

Entity definition

The IfcRelServicesBuildings is an objectified relationship that defines the relationship between a system and the sites, buildings, storeys, spaces, or spatial zones, it serves. Examples of systems are:

building service systems (heating, cooling, waste water system) represented by instances of IfcDistributionSystem;
building systems (fenestration, shading) represented by instances of IfcBuildingSystem;
zones as collection of logically grouped spaces represented by instances of IfcZone
idealized structural analysis systems represented by instances of IfcStructuralAnalysisModel.

NOTE The name IfcRelServicesBuildings is a known anomaly, as the relationship is not restricted to buildings anymore.

HISTORY New entity in IFC1.0.

IFC2x CHANGE The data type of the attribute RelatedBuildings has been changed from IfcBuilding to its supertype IfcSpatialStructureElement with upward compatibility for file based exchange.

Attribute definitions

#	Attribute	Type	Cardinality	Description	C
5	RelatingSystem	IfcSystem	[1:1]	System that services the Buildings.	X
6	RelatedBuildings	IfcSpatialElement	S[1:?]	Spatial structure elements (including site, building, storeys) that are serviced by the system.	X

Inherited definitions from supertypes

Entity inheritance

Attribute inheritance

#	Attribute	Type	Cardinality	Description	C
IfcRoot
1	GlobalId	IfcGloballyUniqueId	[1:1]	Assignment of a globally unique identifier within the entire software world.	X
2	OwnerHistory	IfcOwnerHistory	[0:1]	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 - either as addition, deletion or modification.	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
IfcRelationship
IfcRelConnects
IfcRelServicesBuildings
5	RelatingSystem	IfcSystem	[1:1]	System that services the Buildings.	X
6	RelatedBuildings	IfcSpatialElement	S[1:?]	Spatial structure elements (including site, building, storeys) that are serviced by the system.	X

Definitions applying to Common Use Definitions

Concept inheritance

#	Concept	Model View
IfcRoot
	Software Identity	Common Use Definitions
	Revision Control	Common Use Definitions

Formal representations

XSD Specification

 <xs:element name="IfcRelServicesBuildings" type="ifc:IfcRelServicesBuildings" substitutionGroup="ifc:IfcRelConnects" nillable="true"/>

 <xs:complexType name="IfcRelServicesBuildings">

  <xs:complexContent>

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

    <xs:sequence>

     <xs:element name="RelatingSystem" type="ifc:IfcSystem" nillable="true"/>

     <xs:element name="RelatedBuildings">

      <xs:complexType>

       <xs:sequence>

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

       </xs:sequence>

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

       <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 IfcRelServicesBuildings

 SUBTYPE OF (IfcRelConnects);

  RelatingSystem : IfcSystem;

  RelatedBuildings : SET [1:?] OF IfcSpatialElement;

END_ENTITY;

 EXPRESS-G diagram

Link to this page

	Zuordnung Anlage zu räumlicher Gliederung - Relation
	Rel Services Buildings