The OWL API is a Java API and reference implementation for creating, manipulating and serialising OWL Ontologies. The latest version of the API is focused towards OWL 2

A java library for converting obo format documents to OWL, and for converting (a subset of) OWL to obo format. This version has been slightly modified to be included directly in the OWL API. The upstream code for this module and its authors can be found at https://code.google.com/p/oboformat/.

Extends OWLAPI to export ontologies to any RDF4J Rio RDFHandler, including databases and in-memory RDF statement collections.