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Architecture for Software-assisted Quantity Calculus

Published

Author(s)

David W. Flater

Abstract

A quantity value, such as 5 kg, consists of a number and a reference (often an International System of Units (SI)unit) that together express the magnitude of a quantity. Many software libraries, packages, and ontologies that implement "quantities and units" functions are available. Although all of them begin with SI and associated practices, they differ in how they address issues such as ad hoc counting units, ratios of two quantities of the same kind, and uncertainty. This short technical note describes an architecture that addresses the complete set of functions in a simple and consistent fashion. Its goal is to encourage more convergent thinking about the functions and the underlying concepts so that the many disparate implementations, present and future, will become more consistent with one another.
Citation
Technical Note (NIST TN) - 1943
Report Number
1943

Citation

Flater, D. (2016), Architecture for Software-assisted Quantity Calculus, Technical Note (NIST TN), National Institute of Standards and Technology, Gaithersburg, MD, [online], https://doi.org/10.6028/NIST.TN.1943 (Accessed May 30, 2024)

Issues

If you have any questions about this publication or are having problems accessing it, please contact reflib@nist.gov.

Created December 2, 2016, Updated November 10, 2018