Supporters

UnitsML has been shaped by a diverse coalition of organizations across government, academia, and industry — each contributing expertise, resources, and commitment to the goal of unambiguous unit representation in scientific data.

NIST

National Institute of Standards and Technology1998 – present

NIST originated the UnitsML project in 1998 through its Physics Laboratory and Manufacturing Engineering Laboratory. As the U.S. authority on the International System of Units (SI), NIST developed the initial UnitsML schema, built UnitsDB, and sponsored the project through the SIMA (Systems Integration for Manufacturing Applications) program. NIST remains a key supporter through CalConnect TC UNITS.

CalConnect

The Calendaring and Scheduling Consortium2022 – present

CalConnect hosts the current standards body for UnitsML through its Technical Committee on Units of Measure (TC UNITS). Established in 2022, TC UNITS maintains the UnitsML specification, oversees UnitsDB development, and pursues international alignment with ISO, IEC, and BIPM towards a globally interoperable "Digital SI."

Lawrence Berkeley National Laboratory

OASIS TC era

Contributed to the OASIS Technical Committee for UnitsML, bringing expertise in scientific data management and interdisciplinary data exchange from one of the U.S. Department of Energy's national laboratories.

Ribose

2022 – present

Open standards and security company providing engineering support for UnitsML infrastructure — including the UnitsDB Ruby implementations, schema tooling, and this website. Active contributor to CalConnect TC UNITS.

IBM

OASIS TC era

Participated in the OASIS Technical Committee for UnitsML, contributing enterprise XML and data exchange expertise to help shape the standard for industrial and commercial applications.

CML

Chemical Markup LanguageOASIS TC era

The Chemical Markup Language community contributed domain expertise in chemistry-specific unit requirements, ensuring UnitsML could represent the full range of chemical measurement units and quantities.

OASIS

Organization for the Advancement of Structured Information Standards2006 – 2016

Hosted the OASIS Technical Committee for UnitsML from 2006 to 2016, providing the formal standards process that produced the UnitsML 1.0 Committee Specification Drafts (CSD01 through CSD04).

BIPM

International Bureau of Weights and MeasuresAdvisory role

As the custodian of the International System of Units (SI), BIPM provides advisory guidance on the alignment of UnitsML and UnitsDB with the SI Brochure, supporting the "Digital SI" initiative for machine-readable unit definitions.

Become a supporter

UnitsML is developed through open collaboration. If your organization uses or benefits from UnitsML and would like to contribute, you can:

• Join CalConnect TC UNITS — participate in standards development
• Contribute to UnitsDB — help expand and improve the units database
• Develop tooling — build libraries and integrations for your community
• Provide feedback — report issues and suggest improvements

Get in touch through the CalConnect TC UNITS page or the UnitsML GitHub organization.