4.8.3.1 Reference Topology

Structural activities may have a 'Reference' representation describing the distribution of a load.

Figure 114 illustrates an instance diagram.

Reference TopologyIfcProductIfcProductDefinitionShapeIfcTopologyRepresentationIfcGeometricRepresentationContextIfcRepresentationContextIfcLabelIfcLabelIfcTopologicalRepresentationItem

Figure 114 — Reference Topology

mvdXML Specification
<?xml version="1.0"?>
<ConceptTemplate xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema" uuid="79dd6317-2390-44ca-88c2-70d46cd5b969" name="Reference Topology" applicableSchema="IFC4" applicableEntity="IfcProduct">
  <Rules>
    <AttributeRule AttributeName="Representation">
      <EntityRules>
        <EntityRule EntityName="IfcProductDefinitionShape">
          <AttributeRules>
            <AttributeRule AttributeName="Representations">
              <EntityRules>
                <EntityRule EntityName="IfcTopologyRepresentation">
                  <AttributeRules>
                    <AttributeRule AttributeName="ContextOfItems">
                      <EntityRules>
                        <EntityRule EntityName="IfcGeometricRepresentationContext" />
                        <EntityRule EntityName="IfcRepresentationContext" />
                      </EntityRules>
                    </AttributeRule>
                    <AttributeRule AttributeName="RepresentationIdentifier">
                      <EntityRules>
                        <EntityRule EntityName="IfcLabel">
                          <AttributeRules>
                            <AttributeRule Description="Value=Reference" AttributeName="Value=Reference" />
                          </AttributeRules>
                        </EntityRule>
                      </EntityRules>
                    </AttributeRule>
                    <AttributeRule AttributeName="RepresentationType">
                      <EntityRules>
                        <EntityRule EntityName="IfcLabel" />
                      </EntityRules>
                    </AttributeRule>
                    <AttributeRule RuleID="Topology" AttributeName="Items">
                      <EntityRules>
                        <EntityRule EntityName="IfcTopologicalRepresentationItem" />
                      </EntityRules>
                    </AttributeRule>
                  </AttributeRules>
                </EntityRule>
              </EntityRules>
            </AttributeRule>
          </AttributeRules>
        </EntityRule>
      </EntityRules>
    </AttributeRule>
  </Rules>
</ConceptTemplate>

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