Elements based on an 'Axis' representation such as walls, beams, and columns use a path connectivity relationship to indicate parameters for the connection, indicating which side takes precedence for material layers or profiles.
Figure 56 illustrates an instance diagram.
Figure 56 — Path Connectivity |
<?xml version="1.0"?>
<ConceptTemplate xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema" uuid="50170395-87c6-492e-a6fc-9f5f840b114f" name="Path Connectivity" status="sample" applicableSchema="IFC4" applicableEntity="IfcElement">
<Rules>
<AttributeRule AttributeName="ConnectedFrom">
<EntityRules>
<EntityRule EntityName="IfcRelConnectsPathElements">
<AttributeRules>
<AttributeRule RuleID="RelatedElement" AttributeName="RelatedElement">
<EntityRules>
<EntityRule EntityName="IfcElement" />
</EntityRules>
</AttributeRule>
<AttributeRule AttributeName="ConnectionGeometry">
<EntityRules>
<EntityRule EntityName="IfcConnectionCurveGeometry">
<AttributeRules>
<AttributeRule AttributeName="CurveOnRelatingElement">
<EntityRules>
<EntityRule EntityName="IfcPolyline">
<AttributeRules>
<AttributeRule AttributeName="Points">
<EntityRules>
<EntityRule EntityName="IfcCartesianPoint" />
</EntityRules>
</AttributeRule>
</AttributeRules>
</EntityRule>
</EntityRules>
</AttributeRule>
<AttributeRule AttributeName="CurveOnRelatedElement">
<EntityRules>
<EntityRule EntityName="IfcPolyline">
<AttributeRules>
<AttributeRule AttributeName="Points">
<EntityRules>
<EntityRule EntityName="IfcCartesianPoint" />
</EntityRules>
</AttributeRule>
</AttributeRules>
</EntityRule>
</EntityRules>
</AttributeRule>
</AttributeRules>
</EntityRule>
</EntityRules>
</AttributeRule>
<AttributeRule AttributeName="RelatingPriorities">
<EntityRules>
<EntityRule EntityName="IfcInteger" />
</EntityRules>
</AttributeRule>
<AttributeRule AttributeName="RelatedPriorities">
<EntityRules>
<EntityRule EntityName="IfcInteger" />
</EntityRules>
</AttributeRule>
<AttributeRule AttributeName="RelatedConnectionType">
<EntityRules>
<EntityRule EntityName="IfcConnectionTypeEnum" />
</EntityRules>
</AttributeRule>
<AttributeRule AttributeName="RelatingConnectionType">
<EntityRules>
<EntityRule EntityName="IfcConnectionTypeEnum" />
</EntityRules>
</AttributeRule>
</AttributeRules>
</EntityRule>
</EntityRules>
</AttributeRule>
<AttributeRule AttributeName="ConnectedTo" />
</Rules>
</ConceptTemplate>