Matériaux de construction type
Baumaterial - Ressource -Typ

The resource type IfcConstructionMaterialType defines commonly shared information for occurrences of construction material resources. The set of shared information may include:

It is used to define a construction material resource specification (the specific resource information that is common to all occurrences of that resource). Resource types may be exchanged without being already assigned to occurrences.

Occurrences of the IfcConstructionMaterialResourceType are represented by instances of IfcConstructionMaterialResource.

HISTORY  New entity in IFC4.

Assignment Use Definition

In addition to assignments specified at the base class IfcConstructionResourceType, a construction material resource type may have assignments of its own using IfcRelAssignsToResource where RelatingResource refers to the IfcConstructionMaterialResourceType and RelatedObjects contains one or more IfcTypeProduct subtypes. Such relationship indicates material specifications to be used as input, which is instantiated as an occurrence assigned for each resource occurrence. The IfcGeographicElementType product type may be used to hold the material representation (via IfcRelAssociatesMaterial. There may be multiple chains of production where such product type may have its own task and resource types assigned indicating how to transport or extract such material.

XSD Specification:

 <xs:element name="IfcConstructionMaterialResourceType" type="ifc:IfcConstructionMaterialResourceType" substitutionGroup="ifc:IfcConstructionResourceType" nillable="true"/>
 <xs:complexType name="IfcConstructionMaterialResourceType">
   <xs:extension base="ifc:IfcConstructionResourceType">
    <xs:attribute name="PredefinedType" type="ifc:IfcConstructionMaterialResourceTypeEnum" use="optional"/>

EXPRESS Specification:

ENTITY IfcConstructionMaterialResourceType
SUBTYPE OF IfcConstructionResourceType;
PredefinedType : IfcConstructionMaterialResourceTypeEnum;
CorrectPredefinedType : (PredefinedType <> IfcConstructionMaterialResourceTypeEnum.USERDEFINED) OR ((PredefinedType = IfcConstructionMaterialResourceTypeEnum.USERDEFINED) AND EXISTS(SELF\IfcTypeResource.ResourceType));

Link to EXPRESS-G diagram EXPRESS-G diagram

Attribute Definitions:

PredefinedType : Defines types of construction material resources.

Inheritance Graph:

ENTITY IfcConstructionMaterialResourceType
GlobalId : IfcGloballyUniqueId;
OwnerHistory : OPTIONAL IfcOwnerHistory;
Name : OPTIONAL IfcLabel;
Description : OPTIONAL IfcText;
ENTITY IfcObjectDefinition
HasAssignments : SET OF IfcRelAssigns FOR RelatedObjects;
Nests : SET [0:1] OF IfcRelNests FOR RelatedObjects;
IsNestedBy : SET OF IfcRelNests FOR RelatingObject;
HasContext : SET [0:1] OF IfcRelDeclares FOR RelatedDefinitions;
IsDecomposedBy : SET OF IfcRelAggregates FOR RelatingObject;
Decomposes : SET [0:1] OF IfcRelAggregates FOR RelatedObjects;
HasAssociations : SET OF IfcRelAssociates FOR RelatedObjects;
ENTITY IfcTypeObject
ApplicableOccurrence : OPTIONAL IfcIdentifier;
HasPropertySets : OPTIONAL SET [1:?] OF IfcPropertySetDefinition;
Types : SET [0:1] OF IfcRelDefinesByType FOR RelatingType;
ENTITY IfcTypeResource
Identification : OPTIONAL IfcIdentifier;
LongDescription : OPTIONAL IfcText;
ResourceType : OPTIONAL IfcLabel;
ResourceOf : SET OF IfcRelAssignsToResource FOR RelatingResource;
ENTITY IfcConstructionResourceType
BaseCosts : OPTIONAL LIST [1:?] OF IfcAppliedValue;
BaseQuantity : OPTIONAL IfcPhysicalQuantity;
ENTITY IfcConstructionMaterialResourceType
PredefinedType : IfcConstructionMaterialResourceTypeEnum;

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