IfcCartesianPointList

BACnet MVD

#### IfcCartesianPointList

Natural language names

| Liste von Kartesischen Punkten
| Cartesian Point List
| Liste de points cartésiens

Change log

Item | SPF | XML | Change | Description
--- | --- | --- | --- | ---
IFC2x3 to IFC4
IfcCartesianPointList |  |  | ADDED |

##### Semantic definitions at the entity

Entity definition

The IfcCartesianPointList is the abstract supertype of list of points.

> NOTE The IfcCartesianPointList is introduced to provide a compact representation of potentially larger list of points, such as in point clouds, and in indexable representation of points.

> HISTORY New entity in IFC4.

Attribute definitions

# | Attribute | Type | Cardinality | Description | B
--- | --- | --- | --- | --- | ---
| Dim :=IfcPointListDim(SELF) | IfcDimensionCount |  | The space dimensionality of this class, either 2 or 3, depending on the sub type. | 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

IfcGeometricRepresentationItem
IfcCartesianPointList
| Dim :=IfcPointListDim(SELF) | IfcDimensionCount |  | The space dimensionality of this class, either 2 or 3, depending on the sub type. | X | X

##### Formal representations

XML Specification
`<xs:element name="IfcCartesianPointList" type="ifc:IfcCartesianPointList" abstract="true" substitutionGroup="ifc:IfcGeometricRepresentationItem" nillable="true"/>
<xs:complexType name="IfcCartesianPointList" abstract="true">
<xs:complexContent>
<xs:extension base="ifc:IfcGeometricRepresentationItem"/>
</xs:complexContent>
</xs:complexType>
`
EXPRESS Specification
`ENTITY IfcCartesianPointList
ABSTRACT SUPERTYPE OF(ONEOF(IfcCartesianPointList2D, IfcCartesianPointList3D))
SUBTYPE OF (IfcGeometricRepresentationItem);
DERIVE
Dim : IfcDimensionCount := IfcPointListDim(SELF);
END_ENTITY;

EXPRESS-G diagram

`

References: IfcIndexedPolyCurve

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