6.1.3.13 IfcCoveringType

Bekleidung / Belag - Typ
Revêtement type

The element type IfcCoveringType defines commonly shared information for occurrences of coverings. The set of shared information may include:

It is used to define an covering specification or covering style (i.e. the specific product information, that is common to all occurrences of that product type). Covering types may be exchanged without being already assigned to occurrences.

The occurrences of the IfcCoveringType are represented by instances of IfcCovering

HISTORY  New entity in IFC2x2.

Informal Propositions:

  1. The material assignment, if provided using the IfcRelAssociatesMaterial relationship, shall not reference IfcMaterialLayerSetUsage or IfcMaterialProfileSetUsage.

Common Use Definitions

The following concepts are inherited at supertypes:

 Instance diagram

Material Layer Set

The Material Layer Set concept applies to this entity.

The material of the IfcCoveringType is defined by IfcMaterialLayerSet for layer-based coverings or as fall back by IfcMaterial and attached by the IfcRelAssociatesMaterial.RelatingMaterial. It is accessible by the inverse HasAssociations relationship.



Material Profile Set

The Material Profile Set concept applies to this entity.

The material of the IfcCoveringType is defined by IfcMaterialProfileSet for profile-based coverings or as fall back by IfcMaterial and attached by the IfcRelAssociatesMaterial.RelatingMaterial. It is accessible by the inverse HasAssociations relationship.



Type Body Geometry

The Type Body Geometry concept applies to this entity.

The IfcCoveringType may define the shared geometric representation for all covering occurrences. The RepresentationMaps attribute refers to a list of IfcRepresentationMap's, that allow for multiple geometric representations (e.g. with IfcShaperepresentation's having an RepresentationIdentifier 'Box', 'Surface', or 'Body'). (See geometric use definition of IfcCovering for further information).

NOTE  If the IfcCoveringType has an associated IfcMaterialLayerSet, then no shared geometric representation shall be provided.
NOTE  The product shape representations are defined as RepresentationMaps (attribute of the supertype IfcTypeProduct), which get assigned by an element occurrence instance through the IfcShapeRepresentation.Item[n] being an IfcMappedItem. See IfcTypeProduct for further information.
NOTE  The values of attributes RepresentationIdentifier and RepresentationType of IfcShapeRepresentation are restricted in the same way as those for IfcCoveringType.



XSD Specification:

 <xs:element name="IfcCoveringType" type="ifc:IfcCoveringType" substitutionGroup="ifc:IfcBuildingElementType" nillable="true"/>
 <xs:complexType name="IfcCoveringType">
  <xs:complexContent>
   <xs:extension base="ifc:IfcBuildingElementType">
    <xs:attribute name="PredefinedType" type="ifc:IfcCoveringTypeEnum" use="optional"/>
   </xs:extension>
  </xs:complexContent>
 </xs:complexType>

EXPRESS Specification:

ENTITY IfcCoveringType
SUBTYPE OF IfcBuildingElementType;
PredefinedType : IfcCoveringTypeEnum;
WHERE
CorrectPredefinedType : (PredefinedType <> IfcCoveringTypeEnum.USERDEFINED) OR ((PredefinedType = IfcCoveringTypeEnum.USERDEFINED) AND EXISTS(SELF\IfcElementType.ElementType));
END_ENTITY;

Link to EXPRESS-G diagram EXPRESS-G diagram

Attribute Definitions:

PredefinedType : Predefined types to define the particular type of the covering. There may be property set definitions available for each predefined type.

Formal Propositions:

CorrectPredefinedType : The inherited attribute ElementType shall be provided, if the PredefinedType is set to USERDEFINED.

Inheritance Graph:

ENTITY IfcCoveringType
ENTITY IfcRoot
GlobalId : IfcGloballyUniqueId;
OwnerHistory : OPTIONAL IfcOwnerHistory;
Name : OPTIONAL IfcLabel;
Description : OPTIONAL IfcText;
ENTITY IfcObjectDefinition
INVERSE
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;
INVERSE
Types : SET [0:1] OF IfcRelDefinesByType FOR RelatingType;
ENTITY IfcTypeProduct
RepresentationMaps : OPTIONAL LIST [1:?] OF UNIQUE IfcRepresentationMap;
Tag : OPTIONAL IfcLabel;
INVERSE
ReferencedBy : SET OF IfcRelAssignsToProduct FOR RelatingProduct;
ENTITY IfcElementType
ElementType : OPTIONAL IfcLabel;
ENTITY IfcBuildingElementType
ENTITY IfcCoveringType
PredefinedType : IfcCoveringTypeEnum;
END_ENTITY;

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