#### 5.4.2.2 IfcPhysicalOrVirtualEnum

This enumeration defines the different types of space boundaries in terms of its physical manifestation. A space boundary can either be physically dividing or can be a virtual divider.

> HISTORY New enumeration in IFC2.0

Enumeration:

- PHYSICAL: The space boundary is provided physically (by a physical element).
- VIRTUAL: The space boundary is provided virtually (by a logical divider that has no physical manifestation).
- NOTDEFINED: No information available.

XSD Specification:

<xs:simpleType name="IfcPhysicalOrVirtualEnum">
<xs:restriction base="xs:string">
<xs:enumeration value="physical"/>
<xs:enumeration value="virtual"/>
<xs:enumeration value="notdefined"/>
</xs:restriction>
</xs:simpleType>

EXPRESS Specification:

TYPE IfcPhysicalOrVirtualEnum = ENUMERATION OF (
| PHYSICAL, VIRTUAL, NOTDEFINED);
END_TYPE;

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