# Semantisches Browsen

Abstract Unification in Description Logics (DLs) ha … Unification in Description Logics (DLs) has been proposed as an inference service that can, for example, be used to detect redundancies in ontologies. For the DL EL, which is used to define several large biomedical ontologies, unification is NP-complete. Several algorithms that solve unification in EL have previously been presented. In this paper, we summarize recent extensions of these algorithms that can deal with general concept inclusion axioms (GCIs), role hierarchies(H), and transitive roles (R+). For the algorithms to be complete, however, the ontology consisting of the GCIs and role axioms needs to satisfy a certain cycle restriction.ds to satisfy a certain cycle restriction.  + , , @inproceedings{ BaBM-UNIF12,  address = {Manchester, UK},  author = {Franz {Baader} and Stefan {Borgwardt} and Barbara {Morawska}},  booktitle = {Proceedings of the 26th International Workshop on Unification (UNIF'12)},  editor = {Santiago {Escobar} and Konstantin {Korovin} and Vladimir {Rybakov}},  title = {Recent Advances in Unification for the {$\mathcal{EL}$} Family},  year = {2012},} Inproceedings  + Proceedings of the 26th International Workshop on Unification (UNIF'12)  + BaBM-UNIF12.pdf  + Santiago Escobar and Konstantin Korovin and Vladimir Rybakov  + Baader  + Franz  + Franz Baader, Stefan Borgwardt, Barbara Mo … Franz Baader, Stefan Borgwardt, Barbara Morawska