IFC 4.3.x development

8.7.3.3 IfcAlignmentParameterSegment

Change log

IFC4X3_RC3

added

8.7.3.3.1 Semantic definitions at the entity

An abstract entity defining common information about horizontal, vertical and cant alignment segments.

NOTEĀ  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.

8.7.3.3.1 Attributes

#Attribute Type Description
IfcAlignmentParameterSegment
1StartTag OPTIONAL IfcLabelTag to annotate the start point of the alignment segment.
2EndTag OPTIONAL IfcLabelTag to annotate the end point of the alignment segment.

8.7.3.3.2 Entity inheritance

dot_inheritance IfcAlignmentCantSegment IfcAlignmentCantSegment IfcAlignmentParameterSegment IfcAlignmentParameterSegment IfcAlignmentCantSegment->IfcAlignmentParameterSegment IfcAlignmentHorizontalSegment IfcAlignmentHorizontalSegment IfcAlignmentHorizontalSegment->IfcAlignmentParameterSegment IfcAlignmentVerticalSegment IfcAlignmentVerticalSegment IfcAlignmentVerticalSegment->IfcAlignmentParameterSegment

8.7.3.3.3 Formal representations

ENTITY IfcAlignmentParameterSegment
 ABSTRACT SUPERTYPE OF (ONEOF
	(IfcAlignmentCantSegment
	,IfcAlignmentHorizontalSegment
	,IfcAlignmentVerticalSegment));
	StartTag : OPTIONAL IfcLabel;
	EndTag : OPTIONAL IfcLabel;
END_ENTITY;