IfcStackTerminalTypeEnum

BACnet MVD

#### IfcStackTerminalTypeEnum

Natural language names

| Stack Terminal Type Enum

##### Semantic definitions at the type

Type definition

An IfcStackTerminalTypeEnum defines the range of different types of stack terminal that can be specified for use at the top of a vertical stack subsystem.

> HISTORY New type in IFC2x.

Enumeration definition

Constant | Description
--- | ---
BIRDCAGE | Guard cage, typically wire mesh, at the top of the stack preventing access by birds.
COWL | A cowling placed at the top of a stack to eliminate downdraft.
RAINWATERHOPPER | A box placed at the top of a rainwater downpipe to catch rainwater from guttering.
USERDEFINED | User-defined type.
NOTDEFINED | Undefined type.

##### Formal representations

XML Specification
`<xs:simpleType name="IfcStackTerminalTypeEnum">
<xs:restriction base="xs:string">
<xs:enumeration value="birdcage"/>
<xs:enumeration value="cowl"/>
<xs:enumeration value="rainwaterhopper"/>
<xs:enumeration value="userdefined"/>
<xs:enumeration value="notdefined"/>
</xs:restriction>
</xs:simpleType>
`
EXPRESS Specification
`TYPE IfcStackTerminalTypeEnum = ENUMERATION OF (
BIRDCAGE,
COWL,
RAINWATERHOPPER,
USERDEFINED,
NOTDEFINED);
END_TYPE;

EXPRESS-G diagram

`

References: IfcStackTerminal IfcStackTerminalType

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