IFC 4.3.0.1 (IFC4X3) development

8.20.3.14 IfcPath

8.20.3.14.1 Semantic definition

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.

8.20.3.14.2 Entity inheritance

8.20.3.14.3 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 8.20.3.14.A

8.20.3.14.4 Formal propositions

Name Description
IsContinuous

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

IfcPathHeadToTail(SELF)
Table 8.20.3.14.B

8.20.3.14.5 Formal representation

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

8.20.3.14.6 References

Edit on Github


Is this page difficult to understand? Let us know!

8.20.3.14.7 Changelog

  • where rule, IsContinuous
  • where rule, WR1