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QUDT CATALOG - Quantities, Units, Dimensions and Data Types Ontologies

November 15, 2023

QUDT Ontologies: Schemas and Vocabularies

Warning! Files downloaded from this catalog may not be the latest versions. The master set of files is maintained in our Github repository. The repository also contains additional files that are in various stages of development.

QUDT models are based on dimensional analysis expressed in the OWL Web Ontology Language (OWL). The dimensional approach relates each unit to a system of base units using numeric factors and a vector of exponents defined over a set of fundamental dimensions. In this way, the role of each base unit in the derived unit is precisely defined. A further relationship establishes the semantics of units and quantity kinds. By this means, QUDT supports reasoning over quantity kinds as well as units. QUDT models may be translated into other representations for machine processing, or other programming language structures according to need.

Catalog content is organized in the following sections:

  1. Schemas
  2. Vocabularies (instance graphs)

Schemas

#Graph TypeCatalog Entry TitleCataloged GraphGraph StatusDocumentation
1Schema graphQUDT (OWL)http://qudt.org/2.1/schema/qudtpublished
2023-11-15
 
2Schema graphQUDT (SHACL)http://qudt.org/2.1/schema/shacl/qudtpublished
2023-11-15
 
3Schema graphQUDT (SHACL) OVERLAYhttp://qudt.org/2.1/schema/shacl/overlay/qudtpublished
2023-11-15
 
4Schema graphQUDT Datatypes Schemahttp://qudt.org/2.1/schema/datatypepublished
2023-11-15
 

Vocabulary Graphs

#Graph TypeCatalog Entry TitleCataloged GraphGraph StatusDocumentation
1Vocabulary graphQUDT CONSTANTShttp://qudt.org/2.1/vocab/constantpublished
2023-11-15
 
2Vocabulary graphQUDT CURRENCY UNITShttp://qudt.org/2.1/vocab/currencypublished
2023-11-15
 
3Vocabulary graphQUDT PREFIXEShttp://qudt.org/2.1/vocab/prefixpublished
2023-11-15
 
4Vocabulary graphQUDT QUANTITY KIND DIMENSION VECTORShttp://qudt.org/2.1/vocab/dimensionvectorpublished
2023-11-15
 
5Vocabulary graphQUDT QUANTITY KINDShttp://qudt.org/2.1/vocab/quantitykindpublished
2023-11-15
 
6Vocabulary graphQUDT SYSTEMS OF QUANTITY KINDShttp://qudt.org/2.1/vocab/soqkpublished
2023-11-15
 
7Vocabulary graphQUDT SYSTEMS OF UNITShttp://qudt.org/2.1/vocab/soupublished
2023-11-15
 
8Vocabulary graphQUDT UNITShttp://qudt.org/2.1/vocab/unitpublished
2023-11-15
 

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