IfcProjectLibrary

Item	SPF	XML	Change	Description
IFC2x3 to IFC4
IfcProjectLibrary			ADDED

Semantic definitions at the entity

Entity definition

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

Examples for project libraries include:

\\\* type libraries (also called style or family libraries): a collection of subtypes of IfcTypeObject \\\* property definition libraries: a collections of IfcPropertySetTemplate or IfcPropertyTemplates

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.

NOTE It is generally discouraged to use a different length measure and plane angle measure in an included project library compared with the project itself. It may lead to unexpected results for the shape representation of items included in the 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.

HISTORY New entity in IFC4.

Inherited definitions from supertypes

Entity inheritance

Attribute inheritance

#	Attribute	Type	Cardinality	Description	C
IfcRoot
1	GlobalId	IfcGloballyUniqueId		Assignment of a globally unique identifier within the entire software world.	X
2	OwnerHistory	IfcOwnerHistory	?	Assignment of the information about the current ownership of that object, including owning actor, application, local identification and information captured about the recent changes of the object, NOTE only the last modification in stored - either as addition, deletion or modification. IFC4 CHANGE The attribute has been changed to be OPTIONAL.	X
3	Name	IfcLabel	?	Optional name for use by the participating software systems or users. For some subtypes of IfcRoot the insertion of the Name attribute may be required. This would be enforced by a where rule.	X
4	Description	IfcText	?	Optional description, provided for exchanging informative comments.	X
IfcObjectDefinition
	HasAssociations	IfcRelAssociates @RelatedObjects	S[0:?]	Reference to the relationship objects, that associates external references or other resource definitions to the object.. Examples are the association to library, documentation or classification.	X
IfcContext
5	ObjectType	-		This attribute is out of scope for this model view definition and shall not be set.
6	LongName	-		This attribute is out of scope for this model view definition and shall not be set.
7	Phase	IfcLabel	?	Current project phase, or life-cycle phase of this project. Applicable values have to be agreed upon by view definitions or implementer agreements.	X
8	RepresentationContexts	-		This attribute is out of scope for this model view definition and shall not be set.
9	UnitsInContext	-		This attribute is out of scope for this model view definition and shall not be set.
	IsDefinedBy	IfcRelDefinesByProperties @RelatedObjects	S[0:?]	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. IFC4 CHANGE The data type has been changed from IfcRelDefines to IfcRelDefinesByProperties with upward compatibility for file based exchange.	X
IfcProjectLibrary

Formal representations

XML Specification

 <xs:element name="IfcProjectLibrary" type="ifc:IfcProjectLibrary" substitutionGroup="ifc:IfcContext" nillable="true"/>

 <xs:complexType name="IfcProjectLibrary">

  <xs:complexContent>

   <xs:extension base="ifc:IfcContext"/>

  </xs:complexContent>

 </xs:complexType>

EXPRESS Specification


ENTITY IfcProjectLibrary

 SUBTYPE OF (IfcContext);

END_ENTITY;

 EXPRESS-G diagram

JSON Specification

public class IfcProjectLibrary extends IfcContext

{

}

	Projekbibliothek
	Project Library