IfcExternallyDefinedSurfaceStyle

Natural language names
Extern definiert - Oberflächenstil
Externally Defined Surface Style
Change log
ItemSPFXMLChangeDescription
IFC2x3 to IFC4 4.0.0.0
    IfcExternallyDefinedSurfaceStyle
      LocationMODIFIEDType changed from IfcLabel to IfcURIReference.
      IdentificationXMODIFIEDName changed from ItemReference to Identification.
Semantic definitions at the entity
Entity definition

IfcExternallyDefinedSurfaceStyle is a definition of a surface style through referencing an external source, such as a material library for rendering information.

NOTE  In order to achieve expected results, the externally defined surface style should normally only be given in addition to an explicitly defined surface styles.

HISTORY  New entity in IFC2x2.

IFC2x3 CHANGE  The spelling has been corrected from IfcExternallyDefinedSufaceStyle with no upward compatibility.

Inherited definitions from supertypes
Entity inheritance IfcExternalReference
Attribute inheritance
#AttributeTypeCardinalityDescriptionG
IfcExternalReference
1LocationIfcURIReference? Location, where the external source (classification, document or library) can be accessed by electronic means. The electronic location is provided as an URI, and would normally be given as an URL location string.
IFC4 CHANGE  The data type has been changed from IfcLabel to IfcURIReference
.
X
2IdentificationIfcIdentifier? The Identification provides a unique identifier of the referenced item within the external source (classification, document or library). It may be provided as
  • a key, e.g. a classification notation, like NF2.3
  • a handle
  • a uuid or guid
It may be human readable (such as a key) or not (such as a handle or uuid) depending on the context of its usage (which has to be determined by local agreement).
IFC4 CHANGE Attribute renamed from ItemReference for consistency.
X
3NameIfcLabel? Optional name to further specify the reference. It can provide a human readable identifier (which does not necessarily need to have a counterpart in the internal structure of the document). X
ExternalReferenceForResourcesIfcExternalReferenceRelationship
@RelatingReference
S[0:?]Reference to all associations between this external reference and objects within the IfcResourceObjectSelect that are tagged by the external reference.
IFC4 CHANGE  New inverse attribute added with upward compatibility.
X
IfcExternallyDefinedSurfaceStyle
Formal representations
XML Specification
 <xs:element name="IfcExternallyDefinedSurfaceStyle" type="ifc:IfcExternallyDefinedSurfaceStyle" substitutionGroup="ifc:IfcExternalReference" nillable="true"/>
 <xs:complexType name="IfcExternallyDefinedSurfaceStyle">
  <xs:complexContent>
   <xs:extension base="ifc:IfcExternalReference"/>
  </xs:complexContent>
 </xs:complexType>
EXPRESS Specification
ENTITY IfcExternallyDefinedSurfaceStyle
 SUBTYPE OF (IfcExternalReference);
END_ENTITY;

Link to EXPRESS-G diagram EXPRESS-G diagram

References  References: IfcSurfaceStyleElementSelect

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