Skip to main content
U.S. flag

An official website of the United States government

Dot gov

The .gov means it’s official.
Federal government websites often end in .gov or .mil. Before sharing sensitive information, make sure you’re on a federal government site.


The site is secure.
The https:// ensures that you are connecting to the official website and that any information you provide is encrypted and transmitted securely.

Defining 'kind of quantity'



David W. Flater


The definition of 'kind of quantity' given in the International Vocabulary of Metrology (VIM), 3rd edition, does not cover the historical meaning of the term as it is most commonly used in metrology. Most of its historical meaning has been merged into 'quantity,' which is polysemic across two layers of abstraction. I propose a model of 'kind of quantity' that is compatible with its historical meaning and distinguishable from 'quantity in a general sense.'
Technical Note (NIST TN) - 2034
Report Number
Created February 8, 2019