Natural language names
 | Material |
 | Material |
 | Matériau |
| Material |
| Material |
| Matériau |
| Item | SPF | XML | Change | Description | IFC2x3 to IFC4 |
|---|---|---|---|---|
| IfcMaterial | ||||
| Description | ADDED | |||
| Category | ADDED |
IfcMaterial is a homogeneous or inhomogeneous substance that can be used to form elements (physical products or their components).
IfcMaterial is the basic entity for material designation and definition; this includes identification by name and classification (via reference to an external classification), as well as association of material properties (isotropic or anisotropic) defined by (subtypes of) IfcMaterialProperties. An instance of IfcMaterial may be associated to an element or element type using the IfcRelAssociatesMaterial relationship. The assignment might either be direct as a single material information, or via
An IfcMaterial may also have presentation information associated. Such presentation information is provided by IfcMaterialDefinitionRepresentation, associating curve styles, hatching definitions or surface colouring/rendering information to a material.
HISTORY New entity in IFC4
IFC4 CHANGE The attributes Description and Category have been added.
| # | Attribute | Type | Cardinality | Description | B |
|---|---|---|---|---|---|
| 1 | Name | IfcLabel | [1:1] |
Name of the material.
EXAMPLE A view definition may require Material.Name to uniquely specify e.g. concrete or steel grade, in which case the attribute Material.Category could take the value 'Concrete' or 'Steel'. NOTE Material grade may have different meaning in different view definitions, e.g. strength grade for structural design and analysis, or visible appearance grade in architectural application. Also, more elaborate material grade definition may be associated as classification via inverse attribute HasExternalReferences. | X |
| 2 | Description | IfcText | [0:1] | Definition of the material in more descriptive terms than given by attributes Name or Category. | X |
| 3 | Category | IfcLabel | [0:1] |
Definition of the category (group or type) of material, in more general terms than given by attribute Name.
EXAMPLE A view definition may require each Material.Name to be unique, e.g. for each concrete or steel grade used in a project, in which case Material.Category could take the values 'Concrete' or 'Steel'. | X |
| HasRepresentation | IfcMaterialDefinitionRepresentation @RepresentedMaterial | S[0:1] | Reference to the IfcMaterialDefinitionRepresentation that provides presentation information to a representation common to this material in style definitions. | X |
| # | Attribute | Type | Cardinality | Description | B |
|---|---|---|---|---|---|
| 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. | ||
| HasProperties | IfcMaterialProperties @Material | S[0:?] | Material properties assigned to instances of subtypes of IfcMaterialDefinition. | X | |
| IfcMaterial | |||||
| 1 | Name | IfcLabel | [1:1] |
Name of the material.
EXAMPLE A view definition may require Material.Name to uniquely specify e.g. concrete or steel grade, in which case the attribute Material.Category could take the value 'Concrete' or 'Steel'. NOTE Material grade may have different meaning in different view definitions, e.g. strength grade for structural design and analysis, or visible appearance grade in architectural application. Also, more elaborate material grade definition may be associated as classification via inverse attribute HasExternalReferences. | X |
| 2 | Description | IfcText | [0:1] | Definition of the material in more descriptive terms than given by attributes Name or Category. | X |
| 3 | Category | IfcLabel | [0:1] |
Definition of the category (group or type) of material, in more general terms than given by attribute Name.
EXAMPLE A view definition may require each Material.Name to be unique, e.g. for each concrete or steel grade used in a project, in which case Material.Category could take the values 'Concrete' or 'Steel'. | X |
| HasRepresentation | IfcMaterialDefinitionRepresentation @RepresentedMaterial | S[0:1] | Reference to the IfcMaterialDefinitionRepresentation that provides presentation information to a representation common to this material in style definitions. | X | |
Property Sets for Objects
The Property Sets for Objects concept applies to this entity as shown in Table 103.
| |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Table 103 — IfcMaterial Property Sets for Objects |
| Exchange |  |
 |
 |
 |
|---|---|---|---|---|
| Import | O | R | ||
| Export | O | R |
| # | Concept | Model View |
|---|---|---|
| IfcMaterial | ||
| Property Sets for Objects | Bridge View | |
Instance diagram <xs:element name="IfcMaterial" type="ifc:IfcMaterial" substitutionGroup="ifc:IfcMaterialDefinition" nillable="true"/>
<xs:complexType name="IfcMaterial">
<xs:complexContent>
<xs:extension base="ifc:IfcMaterialDefinition">
<xs:sequence>
<xs:element name="HasRepresentation" type="ifc:IfcMaterialDefinitionRepresentation" nillable="true" minOccurs="0" maxOccurs="1"/>
</xs:sequence>
<xs:attribute name="Name" type="ifc:IfcLabel" use="optional"/>
<xs:attribute name="Description" type="ifc:IfcText" use="optional"/>
<xs:attribute name="Category" type="ifc:IfcLabel" use="optional"/>
</xs:extension>
</xs:complexContent>
</xs:complexType>
ENTITY IfcMaterial
SUBTYPE OF (IfcMaterialDefinition);
Name : IfcLabel;
Description : OPTIONAL IfcText;
Category : OPTIONAL IfcLabel;
INVERSE
HasRepresentation : SET [0:1] OF IfcMaterialDefinitionRepresentation FOR RepresentedMaterial;
END_ENTITY;
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