A system for exploring ontology changes. Currently, OnEX provides access to about 520 versions of 16 well-known life science ontologies. The system is based on a three-tier architecture including an ontology version repository, a middleware component and the OnEX web application. Interactive workflows allow a systematic and explorative change analysis of ontologies and their concepts as well as the semi-automatic migration of out-dated annotations to the current version of an ontology.
Interdisciplinary Centre for Bioinformatics, University of Leipzig, Leipzig, Germany; Institute for Medical Informatics, Statistics and Epidemiology, University of Leipzig, Leipzig, Germany; Department of Computer Science, University of Leipzig, Leipzig, Germany