UEL: unification solver for the description logic EL - system description

UEL is a system that computes unifiers for unification problems formulated in the description logic $\mathcal{EL}$. $\mathcal{EL}$ is a description logic with restricted expressivity, but which is still expressive enough for the formal representation of biomedical ontologies, such as the large medical ontology SNOMED CT. We propose to use UEL as a tool to detect redundancies in such ontologies by computing unifiers of two formal concepts suspected of expressing the same concept of the application domain. UEL can be used as a plug-in of the popular ontology editor Protégé, or as a standalone unification application.