reference nominal property value

https://doi.org/10.1351/goldbook.09998

Nominal property value used as a basis for comparison with nominal property values of nominal properties of the same kind-of-nominal-property.

Note: A reference nominal property value can be a true nominal property value of an examinand, in which case it is unknown, or a conventional nominal property value, in which case it is known.
Source:
PAC, 2018, 90, 913. (Vocabulary on nominal property, examination, and related concepts for clinical laboratory sciences (IFCC-IUPAC Recommendations 2017)) on page 922 [Terms] [Paper]