Browser-based ontology workbench for OWL ontologies and SKOS vocabularies. Streamlit + rdflib, no Java, no Protégé. OWL-RL reasoning, 22 SKOS validation checks, read-only SPARQL console, bulk operations, gist upper-ontology starters, merge-aware imports, interactive vis-network graph.
python sparql rdf semantic-web owl ontology rdflib knowledge-graph skos ontology-editor rdf-graph owl-rl owl-editor streamlit semantic-modeling protege-alternative
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Updated
Sep 8, 2026 - Python