8.20.3.14 IfcPath
8.20.3.14.1 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
- A path has dimensionality 1.
- A path is arcwise connected.
- The edges of the path do not intersect except at common vertices.
- 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. |
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. |
|
|
8.20.3.14.5 Formal representation
ENTITY IfcPath
SUBTYPE OF (IfcTopologicalRepresentationItem);
EdgeList : LIST [1:?] OF UNIQUE IfcOrientedEdge;
WHERE
IsContinuous : IfcPathHeadToTail(SELF);
END_ENTITY;