Scale
A class with identifier http://rds.posccaesar.org/ontology/lis14/rdl/Scale
| Source ontology | Industrial Data Ontology |
| is primitive | true |
| natural language definition | A unit of measure that, when paired with a number, unambiguously describes the magnitude of a physical quantity. |
| primitive rationale | A comprehensive definition of the notion of scale is beyond the scope of IDO. |
| usage note | The permissible number range for a scale may be expressed in OWL. Semi-formal example: If 'Celsius' is the 'uom of datum' of x, then any 'datum value' of x is within the range of -273,1 to infinity. |
| 'scale' corresponds to the common sense notion of unit of measure which unambiguously defines the magnitude of the measure. | |
| See also | ISO 15926-2:2003 'scale' |
| om:Scale | |
| qudt:Scale | |
| Example | centimetre, kilogram per minute, degree Celsius, lunar distance, kilo-lines of code |
| scope note | Arguably, IDO conflates the notions of "unit of measure" and "scale" in an unhealthy way. While a unit of measure is a definite magnitude, a scale arises from fixing a number range to express multiples of the unit of measure. One may argue that a unit of measure has an implicit scale, obtained by multiplying the unit by any number; this will then allow for undefined or meaningless expressions like "minus 10 Kelvin". |