|modifications||attributes EdgeList definition||Changed from list[1:?] of unique IfcOrientedEdge to list[1:?] of IfcOrientedEdge|
|modifications||attributes EdgeList definition||Changed from list[1:?] of IfcOrientedEdge to list[1:?] of unique IfcOrientedEdge|
NOTE Definition according to ISO/CD 10303-42:1992
A path is a topological entity consisting of an ordered collection of oriented edges, such that the edge start vertex of each edge coincides with the edge end of its predecessor. The path is ordered from the edge start of the first oriented edge to the edge end of the last edge. The BOOLEAN value sense in the oriented edge indicates whether the edge direction agrees with the direction of the path (TRUE) or is the opposite direction (FALSE).
An individual edge can only be referenced once by an individual path. An edge can be referenced by multiple paths. An edge can exist independently of a path.
NOTE Entity adapted from path defined in ISO 10303-42.
HISTORY New entity in IFC2.0
|LayerAssignment||SET [0:1] OF IfcPresentationLayerAssignment FOR AssignedItems||Assignment of the representation item to a single or multiple layer(s). The LayerAssignments can override a LayerAssignments of the IfcRepresentation it is used within the list of Items.|
> IFC2x3 CHANGE The inverse attribute LayerAssignments has been added.
> IFC4 CHANGE The inverse attribute LayerAssignment has been restricted to max 1. Upward compatibility for file based exchange is guaranteed.
|StyledByItem||SET [0:1] OF IfcStyledItem FOR Item||Reference to the IfcStyledItem that provides presentation information to the representation, e.g. a curve style, including colour and thickness to a geometric curve.|
> IFC2x3 CHANGE The inverse attribute StyledByItem has been added.
|1||EdgeList||LIST [1:?] OF UNIQUE IfcOrientedEdge||The list of oriented edges which are concatenated together to form this path.|
ENTITY IfcPath SUBTYPE OF (IfcTopologicalRepresentationItem); EdgeList : LIST [1:?] OF UNIQUE IfcOrientedEdge; WHERE IsContinuous : IfcPathHeadToTail(SELF); END_ENTITY;