ONTOLOGY EXPLORER
measurement unit
<https://www.omg.org/spec/Commons/QuantitiesAndUnits/MeasurementUnit>
プロパティと値
| プロパティ | 値 |
|---|---|
| source | "ISO 11240 Health informatics - Identification of medicinal products - Data elements and structures for the unique identification and exchange of units of measurement, clause 3.1.33" |
| source | "ISO 80000-1:2009 Quantities and units - Part 1: General, clause 3.9" |
| source | "https://www.omg.org/spec/SysML/"^^<http://www.w3.org/2001/XMLSchema#anyURI> |
| type | Class |
| label | "measurement unit" |
| subClassOf | MeasurementReference |
| subClassOf | ScalarQuantity |
| subClassOf | _:c14n102 |
| subClassOf | _:c14n1556 |
| subClassOf | _:c14n2189 |
| definition | "real scalar quantity, defined and adopted by convention, with which any other quantity of the same kind can be compared to express the ratio of the second quantity to the first one as a number" |
| example | "week, day, hour, minute, second, kilogram, joule, meter" |
| note | "A Unit is a quantity in terms of which the magnitudes of other quantities that have the same quantity kind can be stated. A unit often relies on precise and reproducible ways to measure the unit. For example, a unit of length such as meter may be specified as a multiple of a particular wavelength of light. A unit may also specify less stable or precise ways to express some value, such as a cost expressed in some currency, or a severity rating measured by a numerical scale." |
| note | "Depending on the nature of the reference scale, the unit of measurement expression may stand either for a physical unit of measurement that is related to a system of quantities (e.g. SI units) or for an arbitrarily defined unit of measurement, which may refer to a certain reference material, a standard measurement procedure, a material measure or even to a combination of those." |
| note | "For a given quantity, the short term 'unit' is often combined with the quantity name, such as 'mass unit' or 'unit of mass'." |
| note | "Measurement units are designated by conventionally assigned names and symbols." |
| note | "Measurement units of quantities of dimension one are numbers. In some cases, these measurement units are given special names, e.g. radian, steradian, and decibel, or are expressed by quotients such as millimole per mole equal to 10 to the power minus 3 and microgram per kilogram equal to 10 to the power minus 9." |
| note | "Measurement units of quantities of the same quantity dimension may be designated by the same name and symbol even when the quantities are not of the same kind. For example, joule per kelvin and J/K are respectively the name and symbol of both a measurement unit of heat capacity and a measurement unit of entropy, which are generally not considered to be quantities of the same kind. However, in some cases special measurement unit names are restricted to be used with quantities of specific kind only. For example, the measurement unit 'second to the power minus one' (1/s) is called hertz (Hz) when used for frequencies and becquerel (Bq) when used for activities of radionuclides. As another example, the joule (J) is used as a unit of energy, but never as a unit of moment of force, i.e. the newton meter (N m)." |
| synonym | "unit of measurement" |