#### IfcMaterialSelect

Natural language names

##### Semantic definitions at the type

Type definition

Selection of whether a material, a material layer, material layer set (with or without usage information) or a material list is assigned to an element.

SELECT

- IfcMaterial
- IfcMaterialList
- IfcMaterialLayer
- IfcMaterialLayerSet
- IfcMaterialLayerSetUsage

> IFC2x PLATFORM CHANGE: IfcMaterialLayer and IfcMaterialLayerSet have been added in the select list with upward compatibility.

Enumeration definition

Constant | Description
--- | ---
IfcMaterial |
IfcMaterialList |
IfcMaterialLayerSetUsage |
IfcMaterialLayerSet |
IfcMaterialLayer |

##### Formal representations

XSD Specification
`<xs:group name="IfcMaterialSelect">
<xs:choice>
<xs:element ref="ifc:IfcMaterial"/>
</xs:choice>
</xs:group>
`
EXPRESS Specification
`TYPE IfcMaterialSelect = SELECT (
IfcMaterial);
END_TYPE;

EXPRESS-G diagram

`

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