URI*
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https://www.omg.org/spec/Commons/QuantitiesAndUnits/
https://www.omg.org/spec/Commons/QuantitiesAndUnits/
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Abstract
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This ontology provides a core set of concepts for quantities, units, systems of quantities, and systems of units. The most widely accepted, scrutinized, and globally used system of quantities and system of units are the International System of Quantities (ISQ) and the International System of Units (SI). They are formally standardized through [ISO 31] and [IEC 60027]. The harmonization of these two sets of standards into one new set [ISO/IEC 80000] has been published by ISO in 2009 and 2010. This ontology is based on the Object Management Group (OMG)'s SysML standard and on ISO/IEC 80000-1:2009, which refers normatively to the ISO/IEC Guide 99:2007. It is compatible with and can be mapped directly to the OMG Date Time Vocabulary (DTV) Quantities Ontology, the de-facto QUDT ontology representing Units of Measure, Quantity Kinds, Dimensions and Data Types (see http://www.qudt.org/), the Units of Measurement Ontology (UO) ontology available from the BioPortal (https://bioportal.bioontology.org/ontologies/UO) and others, as well as the quantities and units library in the SysML specification.
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Contact*
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Mat Portal Metrology Import
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Object creation date property
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http://purl.org/dc/elements/1.1/created
http://purl.org/dc/elements/1.1/created
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Submission date
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April 17, 2026
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Deprecated
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false
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Description*
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The Commons Quantities and Units Ontology is an OMG-led systems-engineering ontology for quantities, quantity values, units, and measurement references. It is designed to interoperate with related standards such as SysML-based models and other quantity-and-unit vocabularies.
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Contributor
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Hans Peter de Koenig, DEKonsult Evan Wallace, U.S. National Institute of Standards and Technology (NIST) Stuart Chalk, University of North Florida Roger Burkhart, Thematix Partners LLC Davide Sottara, Mayo Clinic Elisa Kendall, Thematix Partners LLC |
License
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Representation language*
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OWL
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Object modification date property
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http://purl.org/dc/elements/1.1/modified
http://purl.org/dc/elements/1.1/modified
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Access URL
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https://www.omg.org/spec/Commons/20230801/QuantitiesAndUnits.rdf
https://www.omg.org/spec/Commons/20230801/QuantitiesAndUnits.rdf
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Creation date*
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April 17, 2026
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Status*
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production
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URI Lookup Endpoint
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https://dev.matportal.org/search?ontologies=CQU&require_exact_match=true&q=
search?ontologies=CQU&require_exact_match=true&q=
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Imports
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https://www.omg.org/spec/Commons/AnnotationVocabulary/
https://www.omg.org/spec/Commons/AnnotationVocabulary/
https://www.omg.org/spec/Commons/Classifiers/
https://www.omg.org/spec/Commons/Classifiers/
https://www.omg.org/spec/Commons/Collections/
https://www.omg.org/spec/Commons/Collections/
https://www.omg.org/spec/Commons/ContextualDesignators/
https://www.omg.org/spec/Commons/ContextualDesignators/
https://www.omg.org/spec/Commons/DatesAndTimes/
https://www.omg.org/spec/Commons/DatesAndTimes/
https://www.omg.org/spec/Commons/Designators/
https://www.omg.org/spec/Commons/Designators/
https://www.omg.org/spec/Commons/Documents/
https://www.omg.org/spec/Commons/Documents/
https://www.omg.org/spec/Commons/TextDatatype/
https://www.omg.org/spec/Commons/TextDatatype/
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Version IRI
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https://www.omg.org/spec/Commons/20230801/QuantitiesAndUnits/
https://www.omg.org/spec/Commons/20230801/QuantitiesAndUnits/
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