IfcVectorOrDirection

BACnet MVD

#### IfcVectorOrDirection

Natural language names

| Vector Or Direction
| vecteur ou direction

##### Semantic definitions at the type

Type definition

The IfcVectorOrDirection enables a choice between IfcVector and IfcDirection for vector functions.

> NOTE Definition according to ISO/CD 10303-42:1992
> This type is used to identify the types of entity which can participate in vector computations.

> NOTE Type adapted from vector_or_direction defined in ISO 10303-42.

> HISTORY New type in IFC1.5.

Select definition

Type | Description
--- | ---
IfcDirection |
IfcVector |

##### Formal representations

XML Specification
`<xs:group name="IfcVectorOrDirection">
<xs:choice>
<xs:element ref="ifc:IfcDirection"/>
<xs:element ref="ifc:IfcVector"/>
</xs:choice>
</xs:group>
`
EXPRESS Specification
`TYPE IfcVectorOrDirection = SELECT (
IfcDirection,
IfcVector);
END_TYPE;

EXPRESS-G diagram

`

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