standards > terminology artifact > DOI:10.25504/FAIRsharing.d3pqw7
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ready Quantities, Units, Dimensions and Types

Abbreviation: QUDT


General Information
The QUDT, or 'Quantity, Unit, Dimension and Type' collection of ontologies define the base classes properties, and restrictions used for modeling physical quantities, units of measure, and their dimensions in various measurement systems. QUDT provides a unified model of measurable quantities, units for measuring different kinds of quantities, the numerical values of quantities in different units of measure and the data structures and data types used to store and manipulate these objects in software. This OWL schema is a foundation for a basic treatment of units. Originally developed by TopQuadrant for the NASA Exploration Initiatives Ontology Models (NExIOM) project, they now form the basis of the NASA QUDT Handbook. QUDT aims to improve interoperability of data and the specification of information structures through industry standards for Units of Measure, Quantity Kinds, Dimensions and Data Types.

Homepage http://qudt.org/

Countries that developed this resource United States

Created in 2011

Taxonomic range




How to cite this record FAIRsharing.org: QUDT; Quantities, Units, Dimensions and Types; DOI: https://doi.org/10.25504/FAIRsharing.d3pqw7; Last edited: Jan. 9, 2021, 1:36 p.m.; Last accessed: Jul 29 2021 10:13 a.m.


This record is maintained by steveray  ORCID

Record updated: Jan. 9, 2021, 1:36 p.m. by The FAIRsharing Team.

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No XSD schemas defined


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Applies to: Data use

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QUDT Ontology Display

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Disclaimer: This widget assumes the availability of the ontology resources in the NCBO BioPortal.


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No identifier schema standards defined

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Related Databases (1)
UK Data Archive
The UK Data Archive is an internationally acknowledged centre of expertise in acquiring, curating and providing access to social science and humanities data. We were founded in 1967, at the University of Essex, with the support of the then Social Science Research Council, with the aim of curating high-quality research data for analysis and reuse. The Economic and Social Research Council (ESRC) has continued to provide long-term commitment to the Data Archive and we are now a significant part of their UK data infrastructure. Since 2005 we have been designated a Place of Deposit by the National Archives, allowing us to curate public records. The UK Data Archive is the lead organisation of the UK Data Service, which provides unified access to the UK's largest collection of social, economic and population data. Funded by the ESRC, the UK Data Service provides access to regional, national and international social and economic data, support for policy-relevant research and guidance and training for the development of skills in data use.

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