IfcPHMeasure

BACnet MVD

#### IfcPHMeasure

Natural language names

| PHMeasure
| Mesure de PH

##### Semantic definitions at the type

Type definition

IfcPHMeasure is a measure of the molar hydrogen ion concentration in a liquid (usually defined as the measure of acidity) in a range from 0 to 14.

> HISTORY New type in IFC2x2.

Formal Propositions

Rule | Description
--- | ---
WR21 | The pH value shall be in the range from 0 to 14.

##### Formal representations

XML Specification
`<xs:simpleType name="IfcPHMeasure">
<xs:restriction base="xs:double"/>
</xs:simpleType>
`
EXPRESS Specification
`TYPE IfcPHMeasure = REAL;
WHERE
WR21 : {0.0 <= SELF <= 14.0}
END_TYPE;

EXPRESS-G diagram

`

References: IfcDerivedMeasureValue

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