IfcVertexPoint

BACnet MVD

#### IfcVertexPoint

Natural language names

| Vertexpunkt - Topologie
| Vertex Point
| Sommet (point)

##### Semantic definitions at the entity

Entity definition

> NOTE Definition according to ISO/CD 10303-42:1992
> A vertex point is a vertex which has its geometry defined as a point.

> NOTE Entity adapted from vertex_point defined in ISO 10303-42.

> HISTORY New entity in IFC2x.

Informal Propositions:

1. The domain of the vertex is formally defined to be the domain of its vertex point.

Attribute definitions

# | Attribute | Type | Cardinality | Description | B
--- | --- | --- | --- | --- | ---
1 | VertexGeometry | IfcPoint |  | The geometric point, which defines the position in geometric space of the vertex. | X | X

##### Inherited definitions from supertypes

Entity inheritance
Attribute inheritance

# | Attribute | Type | Cardinality | Description | B
--- | --- | --- | --- | --- | ---
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

X

IfcTopologicalRepresentationItem
IfcVertex
IfcVertexPoint
1 | VertexGeometry | IfcPoint |  | The geometric point, which defines the position in geometric space of the vertex. | X | X

##### Formal representations

XML Specification
`<xs:element name="IfcVertexPoint" type="ifc:IfcVertexPoint" substitutionGroup="ifc:IfcVertex" nillable="true"/>
<xs:complexType name="IfcVertexPoint">
<xs:complexContent>
<xs:extension base="ifc:IfcVertex">
<xs:sequence>
<xs:element name="VertexGeometry" type="ifc:IfcPoint" nillable="true"/>
</xs:sequence>
</xs:extension>
</xs:complexContent>
</xs:complexType>
`
EXPRESS Specification
`ENTITY IfcVertexPoint
SUBTYPE OF (IfcVertex);
VertexGeometry : IfcPoint;
END_ENTITY;

EXPRESS-G diagram

`

References: IfcPointOrVertexPoint

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