IFC (IFC4X3_ADD2) under development IfcPath Semantic definition

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.

Informal Propositions

  1. A path has dimensionality 1.
  2. A path is arcwise connected.
  3. The edges of the path do not intersect except at common vertices.
  4. A path has a finite, non-zero extent. Entity inheritance Attributes

# Attribute Type Description
IfcRepresentationItem (2)
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.

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.

Click to show 2 hidden inherited attributes Click to hide 2 inherited attributes
IfcPath (1)
1 EdgeList LIST [1:?] OF UNIQUE IfcOrientedEdge

The list of oriented edges which are concatenated together to form this path.

Table Formal propositions

Name Description

The end vertex of each edge shall be the same as the start vertex of its successor.

Table Formal representation

 SUBTYPE OF (IfcTopologicalRepresentationItem);
	EdgeList : LIST [1:?] OF UNIQUE IfcOrientedEdge;
	IsContinuous : IfcPathHeadToTail(SELF);
END_ENTITY; References

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  • where rule, IsContinuous
  • where rule, WR1 IFC4.2 IFC4.3_DEV_70ee25e8