IfcOpeningElementTypeEnum

BACnet MVD

#### IfcOpeningElementTypeEnum

Natural language names

| Opening Element Type Enum
| Enumération des types d'ouverture

Change log

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

##### Semantic definitions at the type

Type definition

This enumeration defines the basic types for opening elements.

> HISTORY New enumeration type in IFC4.

Enumeration definition

Constant | Description
--- | ---
OPENING | An opening as subtraction feature that cuts through the element it voids. It thereby creates a hole. An opening in addiion have a particular meaning for either providing a void for doors or windows, or an opening to permit flow of air and passing of light.
RECESS | An opening as subtraction feature that does not cut through the element it voids. It creates a niche or similar voiding pattern.
USERDEFINED | User-defined opening element.
NOTDEFINED | Undefined opening element.

##### Formal representations

XML Specification
`<xs:simpleType name="IfcOpeningElementTypeEnum">
<xs:restriction base="xs:string">
<xs:enumeration value="opening"/>
<xs:enumeration value="recess"/>
<xs:enumeration value="userdefined"/>
<xs:enumeration value="notdefined"/>
</xs:restriction>
</xs:simpleType>
`
EXPRESS Specification
`TYPE IfcOpeningElementTypeEnum = ENUMERATION OF (
OPENING,
RECESS,
USERDEFINED,
NOTDEFINED);
END_TYPE;

EXPRESS-G diagram

`

References: IfcOpeningElement

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