#### 6.1.3.13 IfcRelFlowControlElements

| Verbindet Steuer- / Regeltechnik mit Komponente - Relation

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.

XSD Specification:

<xs:element name="IfcRelFlowControlElements" type="ifc:IfcRelFlowControlElements" substitutionGroup="ifc:IfcRelConnects" nillable="true"/>
<xs:complexType name="IfcRelFlowControlElements">
<xs:complexContent>
<xs:extension base="ifc:IfcRelConnects">
<xs:sequence>
<xs:element name="RelatedControlElements">
<xs:complexType>
<xs:sequence>
<xs:element ref="ifc:IfcDistributionControlElement" maxOccurs="unbounded"/>
</xs:sequence>
<xs:attribute ref="ifc:itemType" fixed="ifc:IfcDistributionControlElement"/>
<xs:attribute ref="ifc:cType" fixed="set"/>
<xs:attribute ref="ifc:arraySize" use="optional"/>
</xs:complexType>
</xs:element>
<xs:element name="RelatingFlowElement" type="ifc:IfcDistributionFlowElement" nillable="true"/>
</xs:sequence>
</xs:extension>
</xs:complexContent>
</xs:complexType>

EXPRESS Specification:

ENTITY IfcRelFlowControlElements

| SUBTYPE OF IfcRelConnects;

RelatedControlElements | : | SET [1:?] OF IfcDistributionControlElement;
RelatingFlowElement | : | IfcDistributionFlowElement;

END_ENTITY;

EXPRESS-G diagram

Attribute Definitions:

RelatedControlElements | : | References control elements which may be used to impart control on the Distribution Element.
RelatingFlowElement | : | Relationship to a distribution flow element

Inheritance Graph:

ENTITY IfcRelFlowControlElements

| ENTITY IfcRoot

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

| ENTITY IfcRelationship

| ENTITY IfcRelConnects

| ENTITY IfcRelFlowControlElements

RelatedControlElements | : | SET [1:?] OF IfcDistributionControlElement;
RelatingFlowElement | : | IfcDistributionFlowElement;

END_ENTITY;

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