RCAO offers a minimal set of classes and relations to guide the representation of knowledge in RDF/OWL.
The ontoloy IRI is: https://w3id.org/rcao/
Here's the RCAO Postcard showing all the classes and relations:

The ontology is available in a number of formats:
You can retrieve any of these through content type negotiation
curl -L -H "Accept: text/turtle https://w3id.org/rcao
curl -L -H "Accept: application/ld+json" https://w3id.org/rcao
curl -L -H "Accept: application/rdf+xml" https://w3id.org/rcao
curl -L -H "Accept: application/n-triples" https://w3id.org/rcao
In addition, individual versions of RCAO are available through the ontology IRI pattern https://w3id.org/rcao/rcao-X.X.X.ttl All versions of the ontology are available from github
We automatically generate documentation for RCAO using OntoSpy, Pylode and Widoco wizard:
This work is fully supported by the EU AIGREGGATE (https://cordis.europa.eu/project/id/101202457] project funded from the European Union´s Horizon 2027 research and innovation program under the grant agreement no 10.3030/101202457.
