Who uses UnitsML?
UnitsML is the authoritative unit-encoding layer in standards and products across shipbuilding, industrial automation, scientific publishing, and markup language design.
Open Class 3D Exchange (OCX)
The vessel-specific XML standard for model-based class approval, used by shipyards and classification societies.
How OCX uses UnitsML →
IEC Common Data Dictionary (CDD)
The IEC's machine-readable dictionary of units, quantities, and product properties for industrial automation.
How IEC CDD uses UnitsML →AnIML
The Analytical Information Markup Language uses UnitsML for spectroscopy and chromatography data exchange.
Plurimath
The math-typesetting library supports UnitsML for semantic unit rendering in scientific documents.
Why organizations choose UnitsML
- Unambiguous — every unit is defined by identity, dimension, and system, not just a symbol.
- SI-aligned — built on the seven SI base quantities and the BIPM SI Brochure.
- Machine-readable — XML schemas validate unit usage in any XML document.
- Interoperable — cross-references to BIPM SI Digital Framework, UCUM, QUDT, and IEC CDD.
- Established — UnitsML since 2003. 23 strong years and counting, under NIST, OASIS, and CalConnect.
Become an adopter
If your standard or product encodes scientific units, UnitsML can provide the semantic foundation. See Incorporating UnitsML for integration patterns, or join CalConnect TC UNITS to help shape the standard.