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Linked Open Vocabularies (LOV)

The LOV dataset contains the description of RDFS vocabularies or OWL ontologies defined for and used by datasets in the Linked Data Cloud. Whenever available each vocabulary...
Product Types Ontology

The Product Types Ontology provides GoodRelations-compatible OWL DL class definitions for ca. 300,000 types of product or services that have an entry in the English Wikipedia
- RDF
- example/turtle

You can also access this registry using the API (see API Docs).