UnitsML

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Resources ​

A collection of presentations, publications, and guidelines from the UnitsML project's 25-year history.

SciDataCon 2022 — Units Summit ​

At the SciDataCon 2022 "Units Summit" session, a comprehensive introduction to UnitsML was presented, covering the project's history, architecture, and future direction under CalConnect TC UNITS.

The presentation covered:

  • The problem of ambiguous units — why existing approaches (code lists, symbols, names) fail for reliable scientific data exchange
  • UnitsML's approach — structured models for encoding units, quantities, and dimensions
  • UnitsDB — the comprehensive database of scientific units, from SI base units to non-SI units
  • Standards governance — the transition from NIST through OASIS to CalConnect TC UNITS
  • Future directions — international alignment with ISO, IEC, and BIPM towards a "Digital SI"

Presentations & Talks ​

Sixth Open Forum on Metadata Registries

Early UnitsML presentation at the metadata registries forum in Santa Fe, NM — one of the first public introductions of the project.

January 2003 · PPT

Publications ​

Improving Interoperability by Incorporating UnitsML into Markup Languages

Peer-reviewed paper in the NIST Journal of Research describing how UnitsML improves data exchange by embedding unambiguous unit definitions in markup languages.

January–February 2010 · NIST JRES · PDF

Guidelines & Rules ​

Guidelines for the Use of UnitsML

Official guidelines document covering how to use UnitsML in practice — writing valid markup, choosing appropriate elements, and incorporating UnitsML into other formats.

Version 1.0-wd01 · PDF

UnitsML Guidelines Draft v0.4.2

Early draft of the UnitsML usage guidelines, providing context on the design decisions and intended usage patterns.

Draft 0.4.2 · DOC