DS/ISO/IEC Guide 99:2008

In this Vocabulary, a set of definitions and associated terms is given, in English and French, for a system of basic and general concepts used in metrology, together with concept diagrams to demonstrate their relations. Additional information is given in the form of examples and notes under
many definitions.
This Vocabulary is meant to be a common reference for scientists and engineers — including
physicists, chemists, medical scientists — as well as for both teachers and practitioners involved in
planning or performing measurements, irrespective of the level of measurement uncertainty and
irrespective of the field of application. It is also meant to be a reference for governmental and intergovernmental bodies, trade associations, accreditation bodies, regulators, and professional societies.
Concepts used in different approaches to describing measurement are presented together. The member organizations of the JCGM can select the concepts and definitions in accordance with their respective terminologies. Nevertheless, this Vocabulary is intended to promote global harmonization of
terminology used in metrology.