IfcSystem

5.4.3.16 IfcSystem

	Système
	System (allgemein)

A system is an organized combination of related parts within an AEC product, composed for a common purpose or function or to provide a service. A system is essentially a functionally related aggregation of products. The grouping relationship to one or several instances of IfcProduct (the system members) is handled by IfcRelAssignsToGroup.

NOTE The use of IfcSystem often applies to the representation of building services related systems, such as the piping system, cold water system, etc. Members within such a system may or may not be connected using the connectivity related entities (through IfcDistributionPort).

HISTORY New entity in IFC1.0

Construction Operations

The following subtypes of IfcSystem are within the scope of this MVD (though corresponding schemas are not incorporated within):

IfcBuildingSystem: A set of building elements designed to support, enclose, shade, insulate, or otherwise perform a common function.
IfcDistributionSystem: A set of distribution elements designed to receive, store, maintain, distribute, or control the flow of a distribution media.

Instance diagram

Identity

The Identity concept applies to this entity.

Exchange
Import	R	R	R	R	R	R	R	R	R	R	R	R	R	R	R	R	R	R	R	R	R	R	R	R	R	R	R	R
Export	R	R	R	R	R	R	R	R	R	R	R	R	R	R	R	R	R	R	R	R	R	R	R	R	R	R	R	R

Revision Control

The Revision Control concept applies to this entity.

Exchange
Import	O	O	O	O	O	O	O	O	O	O	O	O	O	O	O	O	O	O	O	O	O	O	O	O	O	O	O	O
Export	O	O	O	O	O	O	O	O	O	O	O	O	O	O	O	O	O	O	O	O	O	O	O	O	O	O	O	O

External Data Constraints

The External Data Constraints concept applies to this entity as shown in Table 34.

Table Name Reference Format Color

System Name IfcSystem.Name Key #FFFF99

System CreatedBy IfcSystem.OwnerHistory\IfcOwnerHistory.OwningUser\IfcPersonAndOrganization.ThePerson\IfcPerson.Identification #FFCC99

System CreatedOn IfcSystem.OwnerHistory\IfcOwnerHistory.CreationDate #FFFF99

System Category IfcSystem.HasAssociations[*]\IfcRelAssociatesClassification.RelatingClassification\IfcClassificationReference.Identification Key #FFCC99

System ComponentNames IfcSystem.IsGroupedBy[*]\IfcRelAssignsToGroup.RelatedObjects[*] Key #FFCC99

System ExtSystem IfcSystem.OwnerHistory\IfcOwnerHistory.OwningApplication\IfcApplication.ApplicationIdentifier #CC99FF

System ExtObject IfcSystem\ #CC99FF

System ExtIdentifier IfcSystem.GlobalId #CC99FF

System Description IfcSystem.Description #CCFFCC

Table 34 — IfcSystem External Data Constraints

Exchange

Import O O O O O O O O O O O O O O O O O O O O O O O O O O O O

Export O O O O O O O O O O O O O O O O O O O O O O O O O O O O

Group Assignment

The Group Assignment concept applies to this entity as shown in Table 35.

Type Description

IfcElement Systems may contain physical elements.

Table 35 — IfcSystem Group Assignment

Exchange

Import O O O O O O O O O O O O O O O O O O O O O O O O O O O O

Export O O O O O O O O O O O O O O O O O O O O O O O O O O O O

Classification

The Classification concept applies to this entity as shown in Table 36.

Source Name Tokens Description

Construction Specifications Institute OmniClass Table 21 21-00 00 00 Elements

Table 36 — IfcSystem Classification

Exchange

Import

Export

XSD Specification:

<xs:element name="IfcSystem" type="ifc:IfcSystem" substitutionGroup="ifc:IfcGroup" nillable="true"/>
<xs:complexType name="IfcSystem">
  <xs:complexContent>
   <xs:extension base="ifc:IfcGroup"/>
  </xs:complexContent>
</xs:complexType>

EXPRESS Specification:

ENTITY IfcSystem

SUPERTYPE OF(IfcZone)

SUBTYPE OF (IfcGroup);

INVERSE

END_ENTITY;

Attribute Definitions:

Inheritance Graph:

ENTITY IfcSystem

ENTITY IfcRoot

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

ENTITY IfcObjectDefinition

INVERSE

HasAssignments	:	SET OF IfcRelAssigns FOR RelatedObjects;
HasContext	:	SET [0:1] OF IfcRelDeclares FOR RelatedDefinitions;
IsDecomposedBy	:	SET OF IfcRelAggregates FOR RelatingObject;
Decomposes	:	SET [0:1] OF IfcRelAggregates FOR RelatedObjects;
HasAssociations	:	SET OF IfcRelAssociates FOR RelatedObjects;

ENTITY IfcObject

ObjectType

OPTIONAL IfcStrippedOptional;

INVERSE

IsTypedBy	:	SET [0:1] OF IfcRelDefinesByType FOR RelatedObjects;
IsDefinedBy	:	SET OF IfcRelDefinesByProperties FOR RelatedObjects;

ENTITY IfcGroup

INVERSE

IsGroupedBy

SET OF IfcRelAssignsToGroup FOR RelatingGroup;

ENTITY IfcSystem

INVERSE

END_ENTITY;

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