IfcPHMeasure

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.

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

Formal representations

XSD Specification

 <xs:simpleType name="IfcPHMeasure">

  <xs:restriction base="xs:double"/>

 </xs:simpleType>

 <xs:element name="IfcPHMeasure-wrapper" nillable="true">

  <xs:complexType>

   <xs:simpleContent>

    <xs:extension base="ifc:IfcPHMeasure">

     <xs:attributeGroup ref="ifc:instanceAttributes"/>

    </xs:extension>

   </xs:simpleContent>

  </xs:complexType>

 </xs:element>

EXPRESS Specification


TYPE IfcPHMeasure = REAL;
 WHERE

  WR21 : {0.0 <= SELF <= 14.0}
END_TYPE;


 EXPRESS-G diagram

	PHMeasure
	Mesure de PH