Link to this pageThe concept of an Object Association provides the means to associate sources of information (most notably a classification, library, document, approval, contraint, or material) to objects definitions. The information associated may reside internally or externally in regard of the project data.
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<ConceptTemplate uuid="4a224609-6578-4c75-afcf-8affa86e5ef2" name="Classification Association" applicableSchema="IFC4" applicableEntity="IfcObjectDefinition">
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<EntityRule EntityName="IfcAppliedValue">
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<AttributeRule AttributeName="Components">
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<EntityRule EntityName="IfcAppliedValue" />
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<AttributeRule AttributeName="AppliedValue">
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<EntityRule EntityName="IfcLengthMeasure" />
<EntityRule EntityName="IfcReal" />
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<EntityRule EntityName="IfcTable">
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<AttributeRule AttributeName="Rows">
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<EntityRule EntityName="IfcTableRow" />
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<AttributeRule AttributeName="Columns">
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<AttributeRule AttributeName="ReferencePath">
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<AttributeRule AttributeName="Benchmark">
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<AttributeRule AttributeName="ReferencePath">
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<AttributeRule RuleID="Attribute1" AttributeName="AttributeIdentifier" />
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<AttributeRule AttributeName="ObjectiveQualifier">
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<ConceptTemplate uuid="7dadae9c-0026-44d3-ade7-9a843fe2ef0b" name="Document Association" applicableSchema="IFC4" applicableEntity="IfcObjectDefinition">
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<EntityRule EntityName="IfcRelAssociatesDocument">
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<AttributeRule RuleID="Name" AttributeName="Name">
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<AttributeRule AttributeName="Fraction">
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<EntityRule EntityName="IfcMaterialLayerSetUsage">
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<AttributeRule AttributeName="ForLayerSet">
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<AttributeRule AttributeName="LayerThickness">
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<EntityRule EntityName="IfcMaterialLayerWithOffsets">
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<EntityRule EntityName="IfcLayerSetDirectionEnum" />
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<AttributeRule AttributeName="LayerSetDirection">
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<AttributeRule AttributeName="DirectionSense">
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<EntityRule EntityName="IfcDirectionSenseEnum" />
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<AttributeRule AttributeName="OffsetFromReferenceLine">
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<AttributeRule AttributeName="ReferenceExtent">
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<AttributeRule RuleID="AirGap" AttributeName="IsVentilated">
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<AttributeRule RuleID="Category" AttributeName="Category">
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<AttributeRule AttributeName="Priority">
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<AttributeRule AttributeName="CardinalPoint">
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