IfcAlignment2DVerSegLine

Item	SPF	XML	Change	Description
IFC4 ADD1 to IFC4x1
IfcAlignment2DVerSegLine			ADDED

Inherited definitions from supertypes

Entity inheritance

Attribute inheritance

#	Attribute	Type	Cardinality	Description	B
IfcAlignment2DSegment
1	TangentialContinuity	IfcBoolean	[0:1]	Connectivity between the continuous segments is not enforced per se to be tangential. Setting "TangentialContinuity" to True means that the current segment shall continue with tangential continuity to the previous one.	X
2	StartTag	IfcLabel	[0:1]	Tag to annotate the start point of the alignment segment.	X
3	EndTag	IfcLabel	[0:1]	Tag to annotate the end point of the alignment segment.	X
IfcAlignment2DVerticalSegment
4	StartDistAlong	IfcLengthMeasure	[1:1]	Distance along the horizontal alignment, measured along the IfcAlignment2DHorizontal given in the length unit of the global IfcUnitAssignment.	X
5	HorizontalLength	IfcPositiveLengthMeasure	[1:1]	Length measured as distance along the horizontal alignment of the segment.	X
6	StartHeight	IfcLengthMeasure	[1:1]	Elevation in Z of the start point relative to the IfcAlignment coordinate system. NOTE It is strongly advised to not offset the IfcAlignment coordinate system from the project engineering coordinate system.	X
7	StartGradient	IfcRatioMeasure	[1:1]	Gradient of the tangent of the vertical segment at the start point. It is provided as a ratio measure. The ratio is percentage/100 (0.1 is equal to 10%). It has a theoretical range of -∞ < n < ∞ using a ratio measure. The equivalent range measured in degree is -90° < n < 90°. NOTE For practical application of start gradient, the range of the ratio measure should be within the limits of -1 ≤ n ≤ 1 (equivalent in degree -45° ≤ n ≤ 45°). However larger limits might apply for particular usages. Positive gradient means an increasing height at the start (or uphill), a negative gradient means decreasing height at the start (or downhill).	X
	ToVertical	IfcAlignment2DVertical @Segments	S[1:1]	Link to the IfcAlignment2DVertical to which this vertical segment belongs.
IfcAlignment2DVerSegLine

Formal representations

XSD Specification

 <xs:element name="IfcAlignment2DVerSegLine" type="ifc:IfcAlignment2DVerSegLine" substitutionGroup="ifc:IfcAlignment2DVerticalSegment" nillable="true"/>

 <xs:complexType name="IfcAlignment2DVerSegLine">

  <xs:complexContent>

   <xs:extension base="ifc:IfcAlignment2DVerticalSegment"/>

  </xs:complexContent>

 </xs:complexType>

EXPRESS Specification


ENTITY IfcAlignment2DVerSegLine

 SUBTYPE OF (IfcAlignment2DVerticalSegment);

END_ENTITY;

 EXPRESS-G diagram

IfcAlignment2DVerSegLine

Semantic definitions at the entity

Inherited definitions from supertypes

Formal representations