Semantic resources: quantities and units
This category encompasses units of measurement and scales, as well as their definitions, relationships, conversions, and standards. The selected models listed below capture how quantities are measured, including the relationships between the measurand, the measurement method and instrument, the measurement unit and scale, as well as the measurement result and values.
The SI Reference Point is the primary authoritative reference for metrological terms, implemented by the BIPM.
It provides information concerning the following: kinds of quantities, named SI units, SI prefixes, and defining constants. The underlying semantic model allows the creation on-demand of further terms, such as compound units.
Each term is presented both in a human- and machine-readable form and is assigned a resolvable Permanent Digital Identifier (PIDs) and can be harvested and parsed via an API.
The SI Reference Point is part of the SI Digital Framework together with other services: the KCDB CMCs, the KCDB Service Categories and the Nuclides Service.