OntoComPlib is a library for completing OWL ontologies. It is mainly developed for the ontology completion tool OntoComP, which is a plugin for the Protégé 4 ontology editor. OntoComPlib is an extension of the Formal Concept Analysis (FCA) library FCAlib. It implements the ontology completion algorithm presented in [1]. It communicates with the reasoner over the OWL API. Javadoc for OntoComPlib can be accessed here

[1] F. Baader, B. Ganter, U. Sattler, and B. Sertkaya. Completing Description Logic Knowledge Bases using Formal Concept Analysis. In Proceedings of the Twentieth International Joint Conference on Artificial Intelligence (IJCAI-07). AAAI Press, 2007.