8.7.3.3 IfcAlignmentParameterSegment
RV ⓘ
AbV ⓘ
ABSTRACT This definition may not be instantiated
8.7.3.3.1 Semantic definition
An abstract entity defining common information about horizontal, vertical and cant alignment segments.
The start and end tag are defined as annotations, not as referents along the alignment. Only absolute distance expressions are in scope, not distances ahead or behind a referent, such as a station. However such information can be exchanged as tags.8.7.3.3.2 Entity inheritance
8.7.3.3.3 Attributes
| # | Attribute | Type | Description |
|---|---|---|---|
| IfcAlignmentParameterSegment (2) | |||
| 1 | StartTag | OPTIONAL IfcLabel |
Tag to annotate the start point of the alignment segment. |
| 2 | EndTag | OPTIONAL IfcLabel |
Tag to annotate the end point of the alignment segment. |
8.7.3.3.4 Formal representation
ENTITY IfcAlignmentParameterSegment
ABSTRACT SUPERTYPE OF (ONEOF
(IfcAlignmentCantSegment
,IfcAlignmentHorizontalSegment
,IfcAlignmentVerticalSegment));
StartTag : OPTIONAL IfcLabel;
EndTag : OPTIONAL IfcLabel;
END_ENTITY;