IfcMaterialConstituentSet

Item	SPF	XML	Change	Description
IFC2x3 to IFC4
IfcMaterialConstituentSet			ADDED

Semantic definitions at the entity

Entity definition

IfcMaterialConstituentSet is a collection of individual material constituents, each assigning a material to a part of an element. The parts are only identified by a keyword (as opposed to an IfcMaterialLayerSet or IfcMaterialProfileSet where each part has an individual shape parameter (layer thickness or layer profile).

EXAMPLE The different materials of a window construction shall be provided for the window lining and the window glazing. An IfcMaterialConstituentSet is assigned to the window with two IfcMaterialConstituent's, one with the Name = 'Lining', one with the Name = 'Glazing'.

NOTE See the "Material Use Definition" at the individual element to which an IfcMaterialConstituentSet may apply for a required or recommended definition of such keywords.

HISTORY New entity in IFC4.

Attribute definitions

#	Attribute	Type	Cardinality	Description	C
1	Name	IfcLabel	[0:1]	The name by which the constituent set is known.	X
2	Description	IfcText	[0:1]	Definition of the material constituent set in descriptive terms.	X
3	MaterialConstituents	IfcMaterialConstituent	S[1:?]	Identification of the constituents from which the material constituent set is composed.	X

Inherited definitions from supertypes

Entity inheritance

Attribute inheritance

#	Attribute	Type	Cardinality	Description	C
IfcMaterialDefinition
	AssociatedTo	IfcRelAssociatesMaterial @RelatingMaterial	S[0:?]	Use of the IfcMaterialDefinition subtypes within the material association of an element occurrence or element type. The association is established by the IfcRelAssociatesMaterial relationship.	X
	HasExternalReferences	IfcExternalReferenceRelationship @RelatedResourceObjects	S[0:?]	Reference to external references, e.g. library, classification, or document information, that are associated to the material.	X
	HasProperties	IfcMaterialProperties @Material	S[0:?]	Material properties assigned to instances of subtypes of IfcMaterialDefinition.	X
IfcMaterialConstituentSet
1	Name	IfcLabel	[0:1]	The name by which the constituent set is known.	X
2	Description	IfcText	[0:1]	Definition of the material constituent set in descriptive terms.	X
3	MaterialConstituents	IfcMaterialConstituent	S[1:?]	Identification of the constituents from which the material constituent set is composed.	X

Formal representations

XSD Specification

 <xs:element name="IfcMaterialConstituentSet" type="ifc:IfcMaterialConstituentSet" substitutionGroup="ifc:IfcMaterialDefinition" nillable="true"/>

 <xs:complexType name="IfcMaterialConstituentSet">

  <xs:complexContent>

   <xs:extension base="ifc:IfcMaterialDefinition">

    <xs:sequence>

     <xs:element name="MaterialConstituents" nillable="true" minOccurs="0">

      <xs:complexType>

       <xs:sequence>

        <xs:element ref="ifc:IfcMaterialConstituent" maxOccurs="unbounded"/>

       </xs:sequence>

       <xs:attribute ref="ifc:itemType" fixed="ifc:IfcMaterialConstituent"/>

       <xs:attribute ref="ifc:cType" fixed="set"/>

       <xs:attribute ref="ifc:arraySize" use="optional"/>

      </xs:complexType>

     </xs:element>

    </xs:sequence>

    <xs:attribute name="Name" type="ifc:IfcLabel" use="optional"/>

    <xs:attribute name="Description" type="ifc:IfcText" use="optional"/>

   </xs:extension>

  </xs:complexContent>

 </xs:complexType>

EXPRESS Specification


ENTITY IfcMaterialConstituentSet

 SUBTYPE OF (IfcMaterialDefinition);

  Name : OPTIONAL IfcLabel;

  Description : OPTIONAL IfcText;

  MaterialConstituents : OPTIONAL SET [1:?] OF IfcMaterialConstituent;

END_ENTITY;

 EXPRESS-G diagram

	Gruppe von Materialbestandteilen
	Material Constituent Set
	Ensemble de matériaux constitutifs