6.2.3.26 IfcRelFlowControlElements

6.2.3.26.1 Semantic definition

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.

6.2.3.26.2 Entity inheritance

6.2.3.26.3 Attributes

#	Attribute	Type	Description
IfcRoot (4)
1	GlobalId	IfcGloballyUniqueId	Assignment of a globally unique identifier within the entire software world.
2	OwnerHistory	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 is stored - either as addition, deletion or modification. IFC4-CHANGE The attribute has been changed to be OPTIONAL.
3	Name	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.
4	Description	OPTIONAL IfcText	Optional description, provided for exchanging informative comments.
Click to show 4 hidden inherited attributes
IfcRelFlowControlElements (2)
5	RelatedControlElements	SET [1:?] OF IfcDistributionControlElement	References control elements which may be used to impart control on the Distribution Element.
6	RelatingFlowElement	IfcDistributionFlowElement	Relationship to a distribution flow element

Table 6.2.3.26.A

6.2.3.26.4 Concept usage

Concept	Usage	Description
IfcRoot (2)
Revision Control	General	Ownership, history, and merge state is captured using IfcOwnerHistory.
Software Identity	General	IfcRoot assigns the globally unique ID. In addition it may provide for a name and a description about the concept.
Click to show 2 hidden inherited concepts

Table 6.2.3.26.B

6.2.3.26.5 Formal representation

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