IfcRelAssociatesMaterial is an objectified relationship between a material definition and elements or element types to which this material definition applies.
The material definition can be:
Materials can be arranged by layers and applied to layered elements. Typical elements are walls and slabs.
NOTE As a material layer set usage is an occurrence based information, that applies to each individual element, it cannot be assigned to an element type.
Material can be applied to profiles. Typical elements using profile material are beam, column, member
NOTE As a material profile set usage is an occurrence based information, that applies to each individual element, it cannot be assigned to an element type.
Materials can be arranged by identified parts of a component based element. Typical elements are dorrs/windows (with components such as lining, framing and glazing), or distribution elements.
As a fallback, or in cases where only a single material information is needed, material information can be directly associated
If both, the element occurrence (by an instance of IfcElement) and the element type (by an instance of IfcElementType, connected through IfcRelDefinesByType) have an associated material, then the material associated to the element occurrence overrides the material associated to the element type.
HISTORY New entity in IFC2x.
|1||GlobalId||IfcGloballyUniqueId||Assignment of a globally unique identifier within the entire software world.|
|2||OwnerHistory||OPTIONAL IfcOwnerHistory||Assignment of the information about the current ownership of that object, including owning actor, application, local identification and information captured about the recent changes of the object, |
> NOTE only the last modification in stored - either as addition, deletion or modification.
> IFC4 CHANGE The attribute has been changed to be OPTIONAL.
|3||Name||OPTIONAL IfcLabel||Optional name for use by the participating software systems or users. For some subtypes of IfcRoot the insertion of the Name attribute may be required. This would be enforced by a where rule.|
|4||Description||OPTIONAL IfcText||Optional description, provided for exchanging informative comments.|
|5||RelatedObjects||SET [1:?] OF IfcDefinitionSelect||Set of object or property definitions to which the external references or information is associated. It includes object and type objects, property set templates, property templates and property sets and contexts.|
> IFC4 CHANGE The attribute datatype has been changed from IfcRoot to IfcDefinitionSelect.
|6||RelatingMaterial||IfcMaterialSelect||Material definition assigned to the elements or element types.|
IfcRoot assigns the globally unique ID. In addition it may provide for a name and a description about the concept.
Ownership, history, and merge state is captured using IfcOwnerHistory.
ENTITY IfcRelAssociatesMaterial SUBTYPE OF (IfcRelAssociates); RelatingMaterial : IfcMaterialSelect; WHERE NoVoidElement : SIZEOF(QUERY(temp <* SELF\IfcRelAssociates.RelatedObjects | ('IFC4X3_DEV.IFCFEATUREELEMENTSUBTRACTION' IN TYPEOF(temp)) OR ('IFC4X3_DEV.IFCVIRTUALELEMENT' IN TYPEOF(temp)) )) = 0; AllowedElements : SIZEOF(QUERY(temp <* SELF\IfcRelAssociates.RelatedObjects | ( SIZEOF(TYPEOF(temp) * [ 'IFC4X3_DEV.IFCELEMENT', 'IFC4X3_DEV.IFCELEMENTTYPE', 'IFC4X3_DEV.IFCWINDOWSTYLE', 'IFC4X3_DEV.IFCDOORSTYLE', 'IFC4X3_DEV.IFCSTRUCTURALMEMBER', 'IFC4X3_DEV.IFCPORT']) = 0) )) = 0; END_ENTITY;