IFC 4.3.x development

6.2.3.26 IfcRelFlowControlElements

6.2.3.26.1 Semantic definitions at the entity

This objectified relationship between a distribution flow element occurrence and one-to-many control element occurrences indicates that the control element(s) sense or control some aspect of the flow element. It is applied to IfcDistributionFlowElement and IfcDistributionControlElement.

This relationship may be used to indicate an operational relationship such as an actuator operating a valve, damper, or switch. It may also be used to indicate a sensing relationship such as a sensor detecting conditions of fluid flow.

This relationship implies a sensing or controlling relationship; if elements are merely connected without any control relationship, then IfcRelConnectsElements should be used.

HISTORY  New entity in IFC2x.

6.2.3.26.1 Attributes

#Attribute Type Description
IfcRoot
1GlobalId IfcGloballyUniqueId Assignment of a globally unique identifier within the entire software world.
2OwnerHistory OPTIONAL 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.
3Name OPTIONAL 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.
4Description OPTIONAL IfcText Optional description, provided for exchanging informative comments.
IfcRelationship
IfcRelConnects
IfcRelFlowControlElements
5RelatedControlElementsSET [1:?] OF IfcDistributionControlElementReferences control elements which may be used to impart control on the Distribution Element.
6RelatingFlowElement IfcDistributionFlowElement Relationship to a distribution flow element

6.2.3.26.2 Entity inheritance

dot_inheritance IfcRelFlowControlElements IfcRelFlowControlElements IfcRelConnects IfcRelConnects IfcRelFlowControlElements->IfcRelConnects IfcRelConnects_children 15 more... IfcRelConnects_children->IfcRelConnects IfcRelationship IfcRelationship IfcRelConnects->IfcRelationship IfcRelationship_children 5 more... IfcRelationship_children->IfcRelationship IfcRoot IfcRoot IfcRelationship->IfcRoot IfcObjectDefinition IfcObjectDefinition IfcObjectDefinition->IfcRoot IfcPropertyDefinition IfcPropertyDefinition IfcPropertyDefinition->IfcRoot

6.2.3.26.3 Definitions applying to General Usage

6.2.3.26.3.1 Identity

IfcRoot assigns the globally unique ID. In addition it may provide for a name and a description about the concept.

6.2.3.26.3.2 Revision Control

Ownership, history, and merge state is captured using IfcOwnerHistory.

6.2.3.26.4 Formal representations

ENTITY IfcRelFlowControlElements
 SUBTYPE OF (IfcRelConnects);
	RelatedControlElements : SET [1:?] OF IfcDistributionControlElement;
	RelatingFlowElement : IfcDistributionFlowElement;
END_ENTITY;