4.6.8 Product Span Positioning

An IfcProduct can be placed relative to two _IfcReferent_s, which indicate the start and end positions of the product along a linear section.

Figure 179 illustrates an instance diagram.

Product Span PositioningIfcProductIfcRelPositionsIfcLabelIfcReferentIfcReferentTypeEnumIfcRelPositionsIfcLabelIfcReferentIfcReferentTypeEnum

Figure 179 — Product Span Positioning

mvdXML Specification
<?xml version="1.0" encoding="utf-8"?>
<ConceptTemplate xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema" uuid="1cdcaa9f-85d5-42cf-9aaf-0fd663b14ee8" name="Product Span Positioning" applicableSchema="IFC4" applicableEntity="IfcProduct">
  <Rules>
    <AttributeRule RuleID="StartPositionedRelativeTo" AttributeName="PositionedRelativeTo">
      <EntityRules>
        <EntityRule EntityName="IfcRelPositions">
          <AttributeRules>
            <AttributeRule AttributeName="RelatingPositioningElement">
              <EntityRules>
                <EntityRule EntityName="IfcReferent">
                  <AttributeRules>
                    <AttributeRule RuleID="StartPositionType" AttributeName="PredefinedType">
                      <EntityRules>
                        <EntityRule EntityName="IfcReferentTypeEnum" />
                      </EntityRules>
                    </AttributeRule>
                  </AttributeRules>
                </EntityRule>
              </EntityRules>
            </AttributeRule>
            <AttributeRule RuleID="StartPositionName" AttributeName="Name">
              <EntityRules>
                <EntityRule EntityName="IfcLabel" />
              </EntityRules>
            </AttributeRule>
          </AttributeRules>
        </EntityRule>
      </EntityRules>
    </AttributeRule>
    <AttributeRule RuleID="EndPositionedRelativeTo" AttributeName="PositionedRelativeTo">
      <EntityRules>
        <EntityRule EntityName="IfcRelPositions">
          <AttributeRules>
            <AttributeRule AttributeName="RelatingPositioningElement">
              <EntityRules>
                <EntityRule EntityName="IfcReferent">
                  <AttributeRules>
                    <AttributeRule RuleID="EndPositionType" AttributeName="PredefinedType">
                      <EntityRules>
                        <EntityRule EntityName="IfcReferentTypeEnum" />
                      </EntityRules>
                    </AttributeRule>
                  </AttributeRules>
                </EntityRule>
              </EntityRules>
            </AttributeRule>
            <AttributeRule RuleID="EndPositionName" AttributeName="Name">
              <EntityRules>
                <EntityRule EntityName="IfcLabel" />
              </EntityRules>
            </AttributeRule>
          </AttributeRules>
        </EntityRule>
      </EntityRules>
    </AttributeRule>
  </Rules>
</ConceptTemplate>

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