Reference examination procedure used to obtain an examination result without relation to an examination standard for a nominal property of the same kind-of-nominal-property.
Source:
PAC, 2018, 90, 913. 'Vocabulary on nominal property, examination, and related concepts for clinical laboratory sciences (IFCC-IUPAC Recommendations 2017)' on page 930 (https://doi.org/10.1515/pac-2011-0613)