1. BIPM is an intergovernmental organization which acts on matters related to measurement science and measurement standards and is responsible for the SI base units, https://www.bipm.org/en/measurement-units/si-base-units, 03 December 2022.
2. International Vocabulary of Metrology (VIM), third ed., BIPM JCGM 200:2012, quantity 1.1. 03 December 2022.
3. L. Euler, Elements of Algebra, Chapter I, Article I, #3. Third ed., Longman, Hurst, Rees, Orme and Co., London England, 1822. “Now, we cannot measure or determine any quantity, except by considering some other quantity of the same kind as known, and pointing out their mutual relation.”
4. R. Dybkaer, Ontology of property, Chapter 5, 2009, https://ontology.iupac.org/ontology.pdf. Applying this substantial reference, property as used in this (Krechmer) paper is differential. However, Dybkaer does not recognize that a physical property is also relative (i.e., requires calibration).
5. J. de Boer, On the History of Quantity Calculus and the International System, Metrologia, Vol 31, page 405, 1995.