Name	Notation	Description	Types	Status
Collective Standard	collectiveSt	A set of similar material measures or measuring instruments f...	Concept	stable
inapplicable	inapplicable	None of the measurement standards are applicable.	Concept	stable
International Standard	internationalSt	Measurement standard recognized by signatories to an internat...	Concept	stable
National Standard	nationalSt	Measurement standard recognized by national authority to serv...	Concept	stable
Primary Standard	primarySt	Measurement standard established using a primary reference me...	Concept	stable
Reference Standard	referenceSt	Measurement standard designated for the calibration of other ...	Concept	stable
Secondary Standard	secondarySt	Measurement standard established through calibration with res...	Concept	stable
Transfer Standard	transferSt	Device used as an intermediary to compare measurement standar...	Concept	stable
Travelling Standard	travellingSt	Measurement standard, sometimes of special construction, inte...	Concept	stable
unknown	unknown	Measurement standard type is unknown.	Concept	stable
Working Standard	workingSt	Measurement standard that is used routinely to calibrate or v...	Concept	stable