09996 IUPAC Gold Book - nominal property value 10.1351/goldbook.09996 09996 current 1 Feature common to equivalent individual nominal properties. Nominal property values can be words, alphanumerical codes, symbols, etc, but cannot enter into algebraic equations and is not related to a quantity dimension or a measurement unit. A nominal property value can consist of a set of items.Example: The colours of the national flag of Switzerland are red and white. The term "nominal quantity value" and its short form "nominal value" are used to indicate a concept concerning rounded or approximate quantity values. The term "nominal indication interval" is used to indicate a concept concerning rounded or approximate extreme indications. "Yellow" is a nominal property value for a nominal property of the kind-of-nominal-property "colour" of a given Urine as system. There is no separate component. "*1/*3" is a nominal property value for a nominal property of the kind-of-nominal-property "sequence variation" of the CYP2D6 gene in a given "DNA" as system. The allele "*1" is related to normal enzyme activity while the allele "*3" is related to decreased enzyme activity. The species Mycobacterium tuberculosis is a nominal property value for a nominal property of the kind-of-nominal-property taxon of the component Mycobacterium in a given "Expectoration" as system. Infectious diseases might be caused by several different species of Mycobacterium. The species can be examined in a sample from an expectoration. "Oval" is a nominal property value for a nominal property with of kind-of-nominal-property "shape" of the component "Leukocyte nucleus" in a given Blood as system. This shape is typical of immature forms of monocytes, such as promonocytes, kind-of-nominal-property https://goldbook.iupac.org/terms/view/09980 nominal properties https://goldbook.iupac.org/terms/view/09979 taxon https://goldbook.iupac.org/terms/view/09982 PAC, 2018, 90, 913. 'Vocabulary on nominal property, examination, and related concepts for clinical laboratory sciences (IFCC-IUPAC Recommendations 2017)' on page 921 (https://doi.org/10.1515/pac-2011-0613) https://goldbook.iupac.org/terms/view/09996/html https://goldbook.iupac.org/terms/view/09996/json https://goldbook.iupac.org/terms/view/09996/plain Citation: 'nominal property value' in IUPAC Compendium of Chemical Terminology, 5th ed. International Union of Pure and Applied Chemistry; 2025. Online version 5.0.0, 2025. 10.1351/goldbook.09996 The IUPAC Gold Book is licensed under Creative Commons Attribution-ShareAlike CC BY-SA 4.0 International (https://creativecommons.org/licenses/by-sa/4.0/) for individual terms. If you are interested in licensing the Gold Book for commercial use, please contact the IUPAC Executive Director at executivedirector@iupac.org . The International Union of Pure and Applied Chemistry (IUPAC) is continuously reviewing and, where needed, updating terms in the Compendium of Chemical Terminology (the IUPAC Gold Book). Users of these terms are encouraged to include the version of a term with its use and to check regularly for updates to term definitions that you are using. 2026-05-15T06:03:00+00:00