| "the logarithm of the reciprocal of hydrogen-ion concentration in gram atoms per liter; provides a measure on a scale from 0 to 14 of the acidity or alkalinity of a solution (where 7 is neutral and greater than 7 is more basic and less than 7 is more acidic) [from wordnet.princeton.edu/perl/webwn]" [lang: en] |
| •owl:Thing |
| •oilspills:Quantity |
| •oilspills:ChemicalQuantity |
| •oilspills:PH |
| oilspills:ChemicalQuantity |
| oilspills:hasUnit MAX 0 owl:Thing |
Class(oilspills:PH partial oilspills:ChemicalQuantity
restriction(oilspills:hasUnit maxCardinality(0)))