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IfcPHMeasure

Definition from buildingSMART: 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 IFC 2x2.

EXPRESS specification:

TYPE IfcPHMeasure = REAL;
WHERE
WR21  :  {0.0 <= SELF <= 14.0};
END_TYPE;

Formal Propositions:

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