IfcAlignment2DCant

Item	SPF	XML	Change	Description
IFC4x2 to IFC4x3_RC1
IfcAlignment2DCant			ADDED

Semantic definitions at the entity

Entity definition

An IfcAlignment2DCant is a lateral inclination profile defined along the horizontal alignment. All points defined in this profile have two coordinate values. The first value is the distance along the horizontal alignment, and the second value is the height relative to the projection of the point along vertical alignment.

Attribute definitions

#	Attribute	Type	Cardinality	Description	G
1	Segments	IfcAlignment2DCantSegment	L[1:?]	An ordered list of cant alignment segments, each (but the last) are joint end to start.	X
2	RailHeadDistance	IfcPositiveLengthMeasure		Length measured as distance between the nominal centre points of the two contact patches of a wheelset and rails.	X

Inherited definitions from supertypes

Entity inheritance

Attribute inheritance

#	Attribute	Type	Cardinality	Description	G
IfcRepresentationItem
	LayerAssignment	IfcPresentationLayerAssignment @AssignedItems	S[0:1]	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. IFC2x3 CHANGE The inverse attribute LayerAssignments has been added. IFC4 CHANGE The inverse attribute LayerAssignment has been restricted to max 1. Upward compatibility for file based exchange is guaranteed.	X
	StyledByItem	IfcStyledItem @Item	S[0:1]	Reference to the IfcStyledItem that provides presentation information to the representation, e.g. a curve style, including colour and thickness to a geometric curve. IFC2x3 CHANGE The inverse attribute StyledByItem has been added.	X
IfcGeometricRepresentationItem
IfcAxisLateralInclination
	ToLinearAxis	IfcLinearAxisWithInclination @Inclinating	S[1:1]		X
IfcAlignment2DCant
1	Segments	IfcAlignment2DCantSegment	L[1:?]	An ordered list of cant alignment segments, each (but the last) are joint end to start.	X
2	RailHeadDistance	IfcPositiveLengthMeasure		Length measured as distance between the nominal centre points of the two contact patches of a wheelset and rails.	X

Formal representations

XML Specification

 <xs:element name="IfcAlignment2DCant" type="ifc:IfcAlignment2DCant" substitutionGroup="ifc:IfcAxisLateralInclination" nillable="true"/>

 <xs:complexType name="IfcAlignment2DCant">

  <xs:complexContent>

   <xs:extension base="ifc:IfcAxisLateralInclination">

    <xs:sequence>

     <xs:element name="Segments">

      <xs:complexType>

       <xs:sequence>

        <xs:element ref="ifc:IfcAlignment2DCantSegment" maxOccurs="unbounded"/>

       </xs:sequence>

       <xs:attribute ref="ifc:itemType" fixed="ifc:IfcAlignment2DCantSegment"/>

       <xs:attribute ref="ifc:cType" fixed="list"/>

       <xs:attribute ref="ifc:arraySize" use="optional"/>

      </xs:complexType>

     </xs:element>

    </xs:sequence>

    <xs:attribute name="RailHeadDistance" type="ifc:IfcPositiveLengthMeasure" use="optional"/>

   </xs:extension>

  </xs:complexContent>

 </xs:complexType>

EXPRESS Specification


ENTITY IfcAlignment2DCant

 SUBTYPE OF (IfcAxisLateralInclination);

  Segments : LIST [1:?] OF IfcAlignment2DCantSegment;

  RailHeadDistance : IfcPositiveLengthMeasure;

END_ENTITY;

 EXPRESS-G diagram