This category includes semantic resources which can be used to
- Capture and present the information linking data with associated calibration information, including
- Information about the measurement instruments and their properties. 'Instruments' also include data processing or simulation software and its settings.
- Characteristics of measurements and measuring systems such as accuracy, precision, uncertainty, traceability.
- Provide traceability to the SI, where applicable - ideally using the tools described below.
The Key Comparison Database (KCDB) is hosted by the International Bureau of Weights and Measures (Bureau International des Poids et Mesures or BIPM). The data collected in KCDB support the Mutual Recognition Arrangement by International Committee for Weights and Measures (CIPM).
KCDB provides the measurement and administrative data that underpin the internationally recognised Calibration and Measurement Capabilities (CMSs) of the participating measurement institutes.
Each CMC has a unique database identifier (called KCDB CMC ID) structured after this model:
<Regional Metrology Organisation>-<Metrology Area>-<NMI>-<ID>
For example, 'APMP-EM-KR-000006OF-2' represents a measurement of electromagnetic fields, conducted by the Korean metrology institute (KRISS) belonging to APMP. The key comparison datasets are also provided with an identifier structured in a similar manner.
In addition to comparison results and CMC listings, the KCDB website provides important news, updates and statistics.