 | Alignment 2D Segment |
| Item | SPF | XML | Change | Description | IFC4x1 Final 4.1.0.0 |
|---|---|---|---|---|
| IfcAlignment2DSegment | ADDED | IFC4x1 Final 4.1.0.0 | ||
| IfcAlignment2DSegment | ADDED |
An abstract entity defining common information about horizontal and vertical alignment segments.
NOTE 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.
| # | Attribute | Type | Cardinality | Description | G |
|---|---|---|---|---|---|
| 1 | TangentialContinuity | IfcBoolean | ? | 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 | ? | Tag to annotate the start point of the alignment segment. | X |
| 3 | EndTag | IfcLabel | ? | Tag to annotate the end point of the alignment segment. | X |
| # | 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 | |||||
| IfcAlignment2DSegment | |||||
| 1 | TangentialContinuity | IfcBoolean | ? | 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 | ? | Tag to annotate the start point of the alignment segment. | X |
| 3 | EndTag | IfcLabel | ? | Tag to annotate the end point of the alignment segment. | X |
<xs:element name="IfcAlignment2DSegment" type="ifc:IfcAlignment2DSegment" abstract="true" substitutionGroup="ifc:IfcGeometricRepresentationItem" nillable="true"/>
<xs:complexType name="IfcAlignment2DSegment" abstract="true">
<xs:complexContent>
<xs:extension base="ifc:IfcGeometricRepresentationItem">
<xs:attribute name="TangentialContinuity" type="ifc:IfcBoolean" use="optional"/>
<xs:attribute name="StartTag" type="ifc:IfcLabel" use="optional"/>
<xs:attribute name="EndTag" type="ifc:IfcLabel" use="optional"/>
</xs:extension>
</xs:complexContent>
</xs:complexType>
ENTITY IfcAlignment2DSegment
ABSTRACT SUPERTYPE OF(ONEOF(IfcAlignment2DCantSegment, IfcAlignment2DHorizontalSegment, IfcAlignment2DVerticalSegment))
SUBTYPE OF (IfcGeometricRepresentationItem);
TangentialContinuity : OPTIONAL IfcBoolean;
StartTag : OPTIONAL IfcLabel;
EndTag : OPTIONAL IfcLabel;
END_ENTITY;
EXPRESS-G diagram
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