NOTE Definition according to ISO/CD 10303-46:1992
The externally defined hatch style is an entity which makes an external reference to a hatching style.
NOTE The allowable values for the name source and item reference, by which the externally defined hatch style is identified, need to be determined by implementer agreements.
NOTE Corresponding ISO 10303 name: fill_style_select. Please refer to ISO/IS 10303-46:1994 for the final definition of the formal standard.
HISTORY New entity in IFC2x2.
|1||Location||OPTIONAL IfcURIReference||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
|2||Identification||OPTIONAL IfcIdentifier||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.
|3||Name||OPTIONAL IfcLabel||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).|
|ExternalReferenceForResources||SET [0:?] OF IfcExternalReferenceRelationship FOR RelatingReference||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.
ENTITY IfcExternallyDefinedHatchStyle SUBTYPE OF (IfcExternalReference); END_ENTITY;