FAIRsharing is in read-only mode until September while we migrate our data to our new, improved system. In the meantime, please read our blog post or get in touch with us if you need to edit or add records, or have any questions.

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

All

Knowledge Domains

Subjects

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 28 2021 3:04 a.m.

This record is maintained by steveray ORCID

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

Show edit history

Edits to 'https://fairsharing.org/FAIRsharing.d3pqw7' by 'The FAIRsharing Team' at 13:36, 09 Jan 2021 (approved):

'description' has been modified:
Before: 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. The goal of the QUDT ontology is to provide 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. The QUDT Ontologies, and derived XML Vocabularies, are being developed by QUDT.org. Originally, they were developed by TopQuadrant for the NASA Exploration Initiatives Ontology Models (NExIOM) project, a Constellation Program initiative at the AMES Research Center (ARC). They now form the basis of the NASA QUDT Handbook to be published by NASA Headquarters.
After: 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.

Edits to 'https://fairsharing.org/FAIRsharing.d3pqw7' by 'The FAIRsharing Team' at 12:02, 09 Jan 2021 (approved):

	'licences' has been modified:
		Before:
			Creative Commons Attribution-ShareAlike 4.0 International (CC BY-SA 4.0)|https://creativecommons.org/licenses/by-sa/4.0/|Data
		After:
			Creative Commons Attribution 4.0 International (CC BY 4.0)|https://creativecommons.org/licenses/by/4.0/|Data
		Added:
			Creative Commons Attribution 4.0 International (CC BY 4.0)|https://creativecommons.org/licenses/by/4.0/|Data
		Removed:
			Creative Commons Attribution-ShareAlike 4.0 International (CC BY-SA 4.0)|https://creativecommons.org/licenses/by-sa/4.0/|Data

	'related_standards' has been modified:
		Before:
		After:
			Scientific Variables Ontology
			The Unified Code for Units of Measure
			Simple Protocol and RDF Query Language Overview
			Web Ontology Language
		Added:
			Scientific Variables Ontology
			The Unified Code for Units of Measure
			Simple Protocol and RDF Query Language Overview
			Web Ontology Language
		Removed:

	'supportLinks' has been modified:
		Before:
			online documentation|http://qudt.org/
		After:
			help|https://github.com/qudt/qudt-public-repo/wiki/Unit-Vocabulary-Submission-Guidelines
			help|https://github.com/qudt/qudt-public-repo/wiki/User-Guide-for-QUDT
			help|http://qudt.org/video/intro.html
			online documentation|http://github.com/qudt/qudt-public-repo
			online documentation|https://github.com/qudt/qudt-public-repo/blob/master/docs/2020-04-28%20Intro%20to%20QUDT.pdf
			online documentation|http://www.qudt.org/pages/QUDToverviewPage.html
		Added:
			help|https://github.com/qudt/qudt-public-repo/wiki/Unit-Vocabulary-Submission-Guidelines
			help|https://github.com/qudt/qudt-public-repo/wiki/User-Guide-for-QUDT
			help|http://qudt.org/video/intro.html
			online documentation|http://github.com/qudt/qudt-public-repo
			online documentation|https://github.com/qudt/qudt-public-repo/blob/master/docs/2020-04-28%20Intro%20to%20QUDT.pdf
			online documentation|http://www.qudt.org/pages/QUDToverviewPage.html
		Removed:
			online documentation|http://qudt.org/

	'dataProcesses' has been modified:
		Before:
			QUDT Schema - Version 2.1, data versioning, http://qudt.org/2.1/schema/qudt
		After:
			QUDT Schema - Version 2.1, data versioning, http://qudt.org/2.1/schema/qudt
			SPARQL Query (login required), data access, http://qudt.org/edg/tbl
			Browse Vocabularies, data access, http://www.qudt.org/2.1/catalog/qudt-catalog.html
		Added:
			SPARQL Query (login required), data access, http://qudt.org/edg/tbl
			Browse Vocabularies, data access, http://www.qudt.org/2.1/catalog/qudt-catalog.html
		Removed:

Edits to 'https://fairsharing.org/FAIRsharing.d3pqw7' by 'steveray' at 18:26, 15 Nov 2020 (approved):

	'organizations' has been modified:
		Before:
			NASA Ames Research Center, CA, USA|https://www.nasa.gov/ames|Funds
			TopQuadrant|http://www.topquadrant.com/|Funds
			QUDT.org|http://qudt.org|Maintains
			National Aeronautics and Space Administration (NASA), Washington DC, USA|http://www.nasa.gov/|Maintains
			European Space Agency|http://www.esa.int/ESA|Undefined
		After:
			NASA Ames Research Center, CA, USA|https://www.nasa.gov/ames|Funds
			TopQuadrant|http://www.topquadrant.com/|Funds
			QUDT.org|http://qudt.org|Maintains
			European Space Agency|http://www.esa.int/ESA|Undefined
		Added:
		Removed:
			National Aeronautics and Space Administration (NASA), Washington DC, USA|http://www.nasa.gov/|Maintains

	'supportLinks' has been modified:
		Before:
			online documentation|http://tinyurl.com/lzo5drm
		After:
			online documentation|http://qudt.org/
		Added:
			online documentation|http://qudt.org/
		Removed:
			online documentation|http://tinyurl.com/lzo5drm

	'dataProcesses' has been modified:
		Before:
			QUDT Schema - Version 2.0, data versioning, http://qudt.org/doc/2016/DOC_SCHEMA-QUDT-v2.0.html
		After:
			QUDT Schema - Version 2.1, data versioning, http://qudt.org/2.1/schema/qudt
		Added:
			QUDT Schema - Version 2.1, data versioning, http://qudt.org/2.1/schema/qudt
		Removed:
			QUDT Schema - Version 2.0, data versioning, http://qudt.org/doc/2016/DOC_SCHEMA-QUDT-v2.0.html

Edits to 'https://fairsharing.org/FAIRsharing.d3pqw7' by 'The FAIRsharing Team' at 08:11, 17 Jul 2019 (approved):

	'licences' has been modified:
		Before:
			Creative Commons Attribution-ShareAlike 4.0 International License (CC BY-SA 4.0)|https://creativecommons.org/licenses/by-sa/4.0/|Software
		After:
			Creative Commons Attribution-ShareAlike 4.0 International (CC BY-SA 4.0)|https://creativecommons.org/licenses/by-sa/4.0/|Data
		Added:
			Creative Commons Attribution-ShareAlike 4.0 International (CC BY-SA 4.0)|https://creativecommons.org/licenses/by-sa/4.0/|Data
		Removed:
			Creative Commons Attribution-ShareAlike 4.0 International License (CC BY-SA 4.0)|https://creativecommons.org/licenses/by-sa/4.0/|Software

Edits to 'https://fairsharing.org/FAIRsharing.d3pqw7' by 'steveray' at 22:16, 16 Jul 2019 (approved):

	'licences' has been modified:
		Before:
			Creative Commons Attribution-ShareAlike 3.0 United States (CC BY-SA 3.0 US)|https://creativecommons.org/licenses/by-sa/3.0/us/|Data
		After:
			Creative Commons Attribution-ShareAlike 4.0 International License (CC BY-SA 4.0)|https://creativecommons.org/licenses/by-sa/4.0/|Software
		Added:
			Creative Commons Attribution-ShareAlike 4.0 International License (CC BY-SA 4.0)|https://creativecommons.org/licenses/by-sa/4.0/|Software
		Removed:
			Creative Commons Attribution-ShareAlike 3.0 United States (CC BY-SA 3.0 US)|https://creativecommons.org/licenses/by-sa/3.0/us/|Data

	'organizations' has been modified:
		Before:
			Open PHACTS|http://www.openphacts.org/|Funds
			NASA Ames Research Center, CA, USA|https://www.nasa.gov/ames|Funds
			European Space Agency|http://www.esa.int/ESA|Funds
			TopQuadrant|http://www.topquadrant.com/|Maintains
			National Aeronautics and Space Administration (NASA), Washington DC, USA|http://www.nasa.gov/|Maintains
			Siemens Research Labs|http://mysite.du.edu/~msiemens/|Undefined
		After:
			QUDT.org|http://qudt.org|Maintains
			NASA Ames Research Center, CA, USA|https://www.nasa.gov/ames|Funds
			European Space Agency|http://www.esa.int/ESA|Undefined
			TopQuadrant|http://www.topquadrant.com/|Funds
			National Aeronautics and Space Administration (NASA), Washington DC, USA|http://www.nasa.gov/|Maintains
		Added:
			QUDT.org|http://qudt.org|Maintains
			European Space Agency|http://www.esa.int/ESA|Undefined
			TopQuadrant|http://www.topquadrant.com/|Funds
		Removed:
			Open PHACTS|http://www.openphacts.org/|Funds
			European Space Agency|http://www.esa.int/ESA|Funds
			TopQuadrant|http://www.topquadrant.com/|Maintains
			Siemens Research Labs|http://mysite.du.edu/~msiemens/|Undefined

	'description' has been modified:
		Before: 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. The goal of the QUDT ontology is to provide 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. The QUDT Ontologies, and derived XML Vocabularies, are being developed by TopQuadrant and NASA. Originally, they were developed for the NASA Exploration Initiatives Ontology Models (NExIOM) project, a Constellation Program initiative at the AMES Research Center (ARC). They now for the basis of the NASA QUDT Handbook to be published by NASA Headquarters. 
		After: 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. The goal of the QUDT ontology is to provide 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. The QUDT Ontologies, and derived XML Vocabularies, are being developed by QUDT.org. Originally, they were developed by TopQuadrant for the NASA Exploration Initiatives Ontology Models (NExIOM) project, a Constellation Program initiative at the AMES Research Center (ARC). They now form the basis of the NASA QUDT Handbook to be published by NASA Headquarters.

Edits to 'https://fairsharing.org/FAIRsharing.d3pqw7' by 'The FAIRsharing Team' at 09:34, 16 Jul 2019 (approved):

	'contactEmail' has been modified:
		Before: Ralph.Hodgson@nasa.gov
		After: info@qudt.org

	'contact' has been modified:
		Before: Ralph Hodgson
		After: QUDT administrators

	'supportLinks' has been modified:
		Before:
			email|info@qudt.org
			online documentation|http://tinyurl.com/lzo5drm
		After:
			online documentation|http://tinyurl.com/lzo5drm
		Added:
		Removed:
			email|info@qudt.org

Edits to 'https://fairsharing.org/FAIRsharing.d3pqw7' by 'The FAIRsharing Team' at 09:13, 02 Jul 2019 (approved):

	'supportLinks' has been modified:
		Before:
			online documentation|http://tinyurl.com/lzo5drm
		After:
			email|info@qudt.org
			online documentation|http://tinyurl.com/lzo5drm
		Added:
			email|info@qudt.org
		Removed:

	'taxonomies' has been modified:
		Before:
			Not applicable
		After:
			All
		Added:
			All
		Removed:
			Not applicable

	'miriam_id' has been modified:
		Before: None
		After: 

	'onto_disciplines' has been modified:
		Before:
			Astrophysics and Astronomy
		After:
			Astrophysics and Astronomy
			Ontology and Terminology
		Added:
			Ontology and Terminology
		Removed:

	'dataProcesses' has been modified:
		Before:
		After:
			QUDT Schema - Version 2.0
		Added:
			QUDT Schema - Version 2.0
		Removed:

Support

General

help	Submission Guidelines
help	User Guide
help	Introduction to the QUDT EDG Browser
online documentation	GitHub Project
online documentation	Introduction to QUDT (PDF)
online documentation	QUDT Overview

Additional Information

Contact

QUDT administrators

External Links

Bioportal

http://bioportal.bioontology.org/ontologies/QUDT

Tools

QUDT EDG Environment

http://www.qudt.org/edg/tbl

Schemas

No XSD schemas defined

Access / Retrieve Data

Conditions of Use

Applies to: Data use

Creative Commons Attribution 4.0 International (CC BY 4.0)

Data Versioning

QUDT Schema - Version 2.1

http://qudt.org/2.1/schema/qudt

Data Access

SPARQL Query (login required)	http://qudt.org/edg/tbl
Browse Vocabularies	http://www.qudt.org/2.1/catalog/qudt-catalog.html

Publications

No publications available

QUDT Ontology Display

View in BioPortal.

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

Related Standards

Reporting Guidelines

No guidelines defined

Terminology Artifacts

Models and Formats

Identifier Schemas

No identifier schema standards defined

Metrics

No metrics standards defined

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.

Implementing Policies

This record is not implemented by any policy.

Credit

Record Maintainer

This record is maintained by steveray ORCID

Funds

NASA Ames Research Center, CA, USA (Government body)
TopQuadrant (Company)

Maintains

QUDT.org (Charitable foundation) Lead

Undefined

European Space Agency (Government body)

Quantities, Units, Dimensions and Types

We need your help!

Developed by

Contact Us

About FAIRsharing