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Quantities, Units, Dimensions, and Types Ontology
Last uploaded:
June 2, 2026
| Acronym | QUDT |
| Visibility | Public |
| Description | 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. |
| Status | Alpha |
| Format | OWL |
| Categories |
| Contact | Unknown ([email protected]) |
| Creation date | June 2, 2026
|
| Deprecated |
false
See more...
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| Homepage |
http://qudt.org/
See more...
|
| Imports |
http://www.w3.org/2004/02/skos/core
http://www.w3.org/2004/02/skos/core
http://qudt.org/schema/coordinateSystems
http://qudt.org/schema/coordinateSystems
http://www.linkedmodel.org/schema/dtype
http://www.linkedmodel.org/schema/dtype
http://www.linkedmodel.org/schema/vaem
http://www.linkedmodel.org/schema/vaem
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| Object creation date property |
http://purl.org/dc/elements/1.1/created
http://purl.org/dc/elements/1.1/created
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| Object modification date property |
http://purl.org/dc/elements/1.1/modified
http://purl.org/dc/elements/1.1/modified
|
| Submission date | June 2, 2026
|
| Missingimports |
http://qudt.org/schema/coordinateSystems
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http://qudt.org/schema/datatype
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|
| uri |
http://qudt.org/schema/coordinateSystems
http://qudt.org/schema/coordinateSystems
|
| Version | Released | Uploaded | Downloads |
|---|---|---|---|
| unknown (Parsed, Indexed, Metrics, Annotator) | 06/02/2026 | 06/02/2026 | OWL | CSV | RDF/XML | Diff |
| unknown (Archived) | 04/02/2026 | 04/02/2026 | OWL | Diff |
| unknown (Archived) | 09/09/2025 | 09/09/2025 | OWL | Diff |
| unknown (Archived) | 10/19/2023 | 10/19/2023 | OWL | Diff |
| unknown (Archived) | 09/27/2023 | 09/27/2023 | OWL | Diff |
| unknown (Archived) | 08/28/2023 | 08/28/2023 | OWL | Diff |
| unknown (Archived) | 07/28/2023 | 07/28/2023 | OWL | Diff |
| unknown (Archived) | 06/27/2023 | 06/27/2023 | OWL | Diff |
| unknown (Archived) | 05/10/2023 | 05/10/2023 | OWL | Diff |
| unknown (Archived) | 04/12/2023 | 04/12/2023 | OWL | Diff |
| unknown (Archived) | 03/15/2023 | 03/15/2023 | OWL | Diff |
| unknown (Archived) | 03/14/2023 | 03/14/2023 | OWL | Diff |
| unknown (Archived) | 03/02/2023 | 03/02/2023 | OWL | Diff |
| unknown (Archived) | 01/20/2023 | 01/20/2023 | OWL | Diff |
| unknown (Archived) | 12/19/2022 | 12/19/2022 | OWL | Diff |
| $Id: OSG_qudt-(v1.1).ttl 4989 2011-06-01 21:56:40Z RalphHodgson $ (Archived) | 11/28/2022 | 11/28/2022 | OWL | Diff |
| $Id: OSG_qudt-(v1.1).ttl 4989 2011-06-01 21:56:40Z RalphHodgson $ (Archived) | 10/25/2022 | 10/25/2022 | OWL | Diff |
| $Id: OSG_qudt-(v1.1).ttl 4989 2011-06-01 21:56:40Z RalphHodgson $ (Archived) | 09/23/2022 | 09/23/2022 | OWL | Diff |
| $Id: OSG_qudt-(v1.1).ttl 4989 2011-06-01 21:56:40Z RalphHodgson $ (Archived) | 08/02/2022 | 08/02/2022 | OWL | Diff |
| $Id: OSG_qudt-(v1.1).ttl 4989 2011-06-01 21:56:40Z RalphHodgson $ (Archived) | 06/17/2022 | 06/17/2022 | OWL | Diff |
| $Id: OSG_qudt-(v1.1).ttl 4989 2011-06-01 21:56:40Z RalphHodgson $ (Archived) | 06/14/2022 | 06/14/2022 | OWL | Diff |
| $Id: OSG_qudt-(v1.1).ttl 4989 2011-06-01 21:56:40Z RalphHodgson $ (Archived) | 06/09/2022 | 06/09/2022 | OWL | Diff |
| $Id: OSG_qudt-(v1.1).ttl 4989 2011-06-01 21:56:40Z RalphHodgson $ (Archived) | 04/20/2022 | 04/20/2022 | OWL | Diff |
| $Id: OSG_qudt-(v1.1).ttl 4989 2011-06-01 21:56:40Z RalphHodgson $ (Archived) | 02/12/2022 | 02/12/2022 | OWL | Diff |
| $Id: OSG_qudt-(v1.1).ttl 4989 2011-06-01 21:56:40Z RalphHodgson $ (Archived) | 02/03/2022 | 02/03/2022 | OWL | Diff |
| $Id: OSG_qudt-(v1.1).ttl 4989 2011-06-01 21:56:40Z RalphHodgson $ (Archived) | 12/15/2021 | 12/15/2021 | OWL | Diff |
| $Id: OSG_qudt-(v1.1).ttl 4989 2011-06-01 21:56:40Z RalphHodgson $ (Archived) | 12/13/2021 | 12/13/2021 | OWL | Diff |
| $Id: OSG_qudt-(v1.1).ttl 4989 2011-06-01 21:56:40Z RalphHodgson $ (Archived) | 11/02/2021 | 11/02/2021 | OWL | Diff |
| $Id: OSG_qudt-(v1.1).ttl 4989 2011-06-01 21:56:40Z RalphHodgson $ (Archived) | 09/16/2021 | 09/16/2021 | OWL | Diff |
| $Id: OSG_qudt-(v1.1).ttl 4989 2011-06-01 21:56:40Z RalphHodgson $ (Archived) | 08/05/2021 | 08/05/2021 | OWL | Diff |
| $Id: OSG_qudt-(v1.1).ttl 4989 2011-06-01 21:56:40Z RalphHodgson $ (Archived) | 07/20/2021 | 07/20/2021 | OWL | Diff |
| $Id: OSG_qudt-(v1.1).ttl 4989 2011-06-01 21:56:40Z RalphHodgson $ (Archived) | 06/03/2021 | 06/03/2021 | OWL | Diff |
| $Id: OSG_qudt-(v1.1).ttl 4989 2011-06-01 21:56:40Z RalphHodgson $ (Archived) | 05/26/2021 | 05/26/2021 | OWL | Diff |
| $Id: OSG_qudt-(v1.1).ttl 4989 2011-06-01 21:56:40Z RalphHodgson $ (Archived) | 05/24/2021 | 05/24/2021 | OWL | Diff |
| $Id: OSG_qudt-(v1.1).ttl 4989 2011-06-01 21:56:40Z RalphHodgson $ (Archived) | 02/07/2021 | 02/07/2021 | OWL | Diff |
| $Id: OSG_qudt-(v1.1).ttl 4989 2011-06-01 21:56:40Z RalphHodgson $ (Archived) | 04/20/2020 | 04/20/2020 | OWL | Diff |
| $Id: OSG_qudt-(v1.1).ttl 4989 2011-06-01 21:56:40Z RalphHodgson $ (Archived) | 10/08/2019 | 10/08/2019 | OWL | Diff |
| $Id: OSG_qudt-(v1.1).ttl 4989 2011-06-01 21:56:40Z RalphHodgson $ (Archived) | 08/11/2013 | 08/11/2013 | OWL |
| unknown (Archived) | 08/10/2013 | 08/10/2013 | OWL |
| $Id: OSG_qudt-(v1.1).ttl 4989 2011-06-01 21:56:40Z RalphHodgson $ (Archived) | 02/11/2013 | 02/11/2013 | OWL |
| 1.1 (Archived) | 01/06/2011 | 04/05/2012 | OWL |
| more... | |||
No views of QUDT available
| Classes | 105 |
| Individuals | 34 |
| Properties | 196 |
| Maximum depth | 5 |
| Maximum number of children | 28 |
| Average number of children | 4 |
| Classes with a single child | 11 |
| Classes with more than 25 children | 1 |
| Classes with no definition | 99 |