Defined in File Ifc2x3.h
public Ifc2x3::IfcClassificationReference(Class Ifc2x3::IfcClassificationReference)
public Ifc2x3::IfcDocumentReference(Class Ifc2x3::IfcDocumentReference)
public Ifc2x3::IfcExternallyDefinedHatchStyle(Class Ifc2x3::IfcExternallyDefinedHatchStyle)
public Ifc2x3::IfcExternallyDefinedSurfaceStyle(Class Ifc2x3::IfcExternallyDefinedSurfaceStyle)
public Ifc2x3::IfcExternallyDefinedSymbol(Class Ifc2x3::IfcExternallyDefinedSymbol)
public Ifc2x3::IfcExternallyDefinedTextFont(Class Ifc2x3::IfcExternallyDefinedTextFont)
public Ifc2x3::IfcLibraryReference(Class Ifc2x3::IfcLibraryReference)
IfcExternalReference: public IfcUtil::IfcBaseEntity¶
An IfcExternalReference is the identification of information that is not explicitly represented in the current model or in the project database (as an implementation of the current model). Such information may be contained in classifications, documents or libraries. The IfcExternalReference identifies a particular item, such as a dictionary entry, a classification notation, or a document reference within the external source.
Only the Location (as a URL) is given to describe the place where the information can be found. Also an optional Identification as a key to allow more specific references (as to sections or tables) is provided. The Identification defines a system interpretable method to identify the relevant part of information at the source. In addition a human interpretable Name can be assigned to identify the information subject, such as a classification code.
IfcExternalReference is an abstract supertype of all external reference entities.
HISTORY New entity in IFC2x.
Subclassed by Ifc2x3::IfcClassificationReference, Ifc2x3::IfcDocumentReference, Ifc2x3::IfcExternallyDefinedHatchStyle, Ifc2x3::IfcExternallyDefinedSurfaceStyle, Ifc2x3::IfcExternallyDefinedSymbol, Ifc2x3::IfcExternallyDefinedTextFont, Ifc2x3::IfcLibraryReference
Whether the optional attribute Location is defined for this IfcExternalReference.
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.
IFC2x4 CHANGE The data type has been changed from IfcLabel to IfcURIReference.
Whether the optional attribute ItemReference is defined for this IfcExternalReference.
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).
IfcExternalReference(boost::optional<std::string> v1_Location, boost::optional<std::string> v2_ItemReference, boost::optional<std::string> v3_Name)¶