Owl2 Python Packages

open-ontologies-lite

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.

ontolearn

OWL Class Expressions Learning in Python

ontosample

OntoSample is a python package that offers classic sampling techniques for OWL ontologies/knowledge bases. Furthermore, we have tailored the classic sampling techniques to the setting of concept learning making use of learning problem.

pyfactxx

Python bindings to FaCT++ reasoner

semantic-rdf-mapper

Convert tabular data (CSV, Excel, JSON, XML) to RDF triples aligned with OWL ontologies using SKOS-based semantic mapping

hermit-reasoner

A conformant OWL 2 DL tableau reasoner — Python port of HermiT