#### 8.8.3.3 IfcMaterialConstituentSet

| Ensemble de matériaux constitutifs
| Gruppe von Materialbestandteilen

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.

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:extension>
</xs:complexContent>
</xs:complexType>

EXPRESS Specification:

ENTITY IfcMaterialConstituentSet

| SUBTYPE OF (IfcMaterialDefinition);

Name | : | OPTIONAL IfcStrippedOptional;
Description | : | OPTIONAL IfcStrippedOptional;
MaterialConstituents | : | OPTIONAL SET [1:?] OF IfcMaterialConstituent;

END_ENTITY;

Attribute Definitions:

Name | : | The name by which the constituent set is known.
Description | : | Definition of the material constituent set in descriptive terms.
MaterialConstituents | : | Identification of the constituents from which the material constituent set is composed.

Inheritance Graph:

ENTITY IfcMaterialConstituentSet

| ENTITY IfcMaterialDefinition

| INVERSE

AssociatedTo | : | SET [0:?] OF IfcRelAssociatesMaterial FOR RelatingMaterial;
HasProperties | : | SET OF IfcMaterialProperties FOR Material;

| ENTITY IfcMaterialConstituentSet

Name | : | OPTIONAL IfcStrippedOptional;
Description | : | OPTIONAL IfcStrippedOptional;
MaterialConstituents | : | OPTIONAL SET [1:?] OF IfcMaterialConstituent;

END_ENTITY;

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