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5.1.3.12 IfcProjectLibrary

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5.1.3.12.1 Semantic definition

An IfcProjectLibrary collects all library elements that are included within a referenced project data set.

Examples for project libraries include:

The inherited attributes RepresentationContext and UnitsInContext have the following meaning:

  • Context of the representations used within the project library. When the project library includes shape representations for its library type objects, one or several geometric representation contexts need to be included that define the coordinate system, the coordinate space dimensions, and/or the precision factor,
  • Units locally assigned to measure types used within the context of this project library.

Instances of IfcProjectLibrary are assigned to the project context using the IfcRelDeclares relationship and accessible through the inverse attribute HasContext. Individual object types and property (set) templates are assigned to the IfcProjectLibrary using the IfcRelDeclares relationship and are accessible through the inverse attribute Declares. An IfcProjectLibrary may be decomposed into sub libraries using the relationship IfcRelNests. Sub libraries are accessed by the IfcProjectLibrary through the inverse attribute IsNestedBy.

5.1.3.12.2 Entity inheritance

5.1.3.12.3 Attributes

# Attribute Type Description
IfcRoot (4)
IfcObjectDefinition (7)
Click to show 11 hidden inherited attributes
IfcContext (7)
5 ObjectType OPTIONAL IfcLabel

The object type denotes a particular type that indicates the object further. The use has to be established at the level of instantiable subtypes.

6 LongName OPTIONAL IfcLabel

Long name for the context as used for reference purposes.

7 Phase OPTIONAL IfcLabel

Current project phase, or life-cycle phase of this project. Applicable values have to be agreed upon by view definitions or implementer agreements.

8 RepresentationContexts OPTIONAL SET [1:?] OF IfcRepresentationContext

Context of the representations used within the context. When the context is a project and it includes shape representations for its components, one or several geometric representation contexts need to be included that define e.g. the world coordinate system, the coordinate space dimensions, and/or the precision factor.

9 UnitsInContext OPTIONAL IfcUnitAssignment

Units globally assigned to measure types used within the context.

IsDefinedBy SET [0:?] OF IfcRelDefinesByProperties FOR RelatedObjects

Set of relationships to property set definitions attached to this context. Those statically or dynamically defined properties contain alphanumeric information content that further defines the context.

Declares SET [0:?] OF IfcRelDeclares FOR RelatingContext

Reference to the IfcRelDeclares relationship that assigns the uppermost entities of included hierarchies to this context instance.

Table 5.1.3.12.A

5.1.3.12.4 Concept usage

Concept Usage Description
IfcRoot (2)
IfcObjectDefinition (9)
IfcContext (7)
Click to show 18 hidden inherited concepts
Table 5.1.3.12.B

5.1.3.12.5 Formal representation

ENTITY IfcProjectLibrary
SUBTYPE OF (IfcContext);
END_ENTITY;

5.1.3.12.6 References

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5.1.3.12.7 Changelog

5.1.3.12.7.1 IFC4

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