AI-native ontology engine: a Rust MCP server with tools for building, validating, querying, and reasoning over RDF/OWL ontologies. In-memory Oxigraph triple store, native OWL2-DL tableaux reasoner, SHACL validation, SPARQL, versioning. Single binary, no JVM.
Latest release v1.3.0 · 4 Sept 2026
1 file for Claude Code: open-ontologies CLAUDE.md — 5,348 tokens loaded in every session.
CLAUDE.md A 5,348 tok These files are fabio-rovai/open-ontologies's own configuration — they tell Claude Code how to work on this repository, so they are not mods to install elsewhere. Copy one as a starting point and replace the parts that are about this project.