IFC 4.3.0.1 (IFC4X3_TC1)

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,

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.

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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.

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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;

6.2.3.26.6 References