This QUDT1 public repository contains the schema and vocabulary source files for the graphs making up the QUDT collection. It is probably the most convenient way for software developers to include the QUDT ontologies in their work, and is the most up-to-date. However, for those who prefer the linked data world, each QUDT graph is also available in both a versioned and an unversioned form on the qudt.org website.
DOI reference for citations: https://doi.org/10.25504/FAIRsharing.d3pqw7
Here is the core design pattern of the QUDT ontology:
Our current plan is to deliver this material in even more powerful ways. The website now hosts an engine supporting SPARQL and GraphQL queries. Fully resolvable URIs at the graph and instance level are available online. Eventually we will also support resolvable class URIs as well. We are also creating a series of User Guides on the wiki for this repository.
We encourage you to get involved. If you have particular needs or see errors, please create an Issue and/or make changes or additions yourself (please see our Wiki for more detailed instructions, and specifically the Units Submission Guide if you would like to suggest additional units.) We are a volunteer-staffed effort, but we do have infrastructural expenses. Please consider making a DONATION.
Please see the New Features and Releases topic in the Discussions section for status updates.
1 QUDT.org is a 501(c)(3) not-for-profit organization founded to provide semantic specifications for units of measure, quantity kind, dimensions and data types. QUDT is an advocate for the development and implementation of standards to quantify data expressed in RDF and JSON. Our mission is to improve interoperability of data and the specification of information structures through industry standards for Units of Measure, Quantity Kinds, Dimensions and Data Types. Sponsorships are greatly appreciated!
QUDT.org is a member of the World Wide Web Consortium (W3C)
Last updated by: Steve Ray (steve.ray@qudt.org)
Last updated: December 10, 2020