IfcRelServicesBuildings

5.4.3.39 IfcRelServicesBuildings

Zuordnung Anlage zu räumlicher Gliederung - Relation

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.

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;

Link to EXPRESS-G diagram EXPRESS-G diagram

Attribute Definitions:

RelatingSystem

System that services the Buildings.

RelatedBuildings

Spatial structure elements (including site, building, storeys) that are serviced by the system.

IFC2x CHANGE The data type has been changed from IfcBuilding to IfcSpatialStructureElement with upward compatibility for file based exchange.

IFC4 CHANGE The data type has been changed from IfcSpatialStructureElement to IfcSpatialElement with upward compatibility for file based exchange.

Inheritance Graph:

ENTITY IfcRelServicesBuildings

ENTITY IfcRoot

GlobalId	:	IfcGloballyUniqueId;
OwnerHistory	:	OPTIONAL IfcOwnerHistory;
Name	:	OPTIONAL IfcLabel;
Description	:	OPTIONAL IfcText;

ENTITY IfcRelationship

ENTITY IfcRelConnects

ENTITY IfcRelServicesBuildings

RelatingSystem	:	IfcSystem;
RelatedBuildings	:	SET [1:?] OF IfcSpatialElement;

END_ENTITY;

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