Pushing the EL Envelope

Abstract

Recently, it has been shown that the small description logic (DL) EL, which allows for conjunction and existential restrictions, has better algorithmic properties than its counterpart FL0, which allows for conjunction and value restrictions. Whereas the subsumption problem in FL0 becomes already intractable in the presence of acyclic TBoxes, it remains tractable in EL even with general concept inclusion axioms (GCIs). On the one hand, we extend the positive result for EL by identifying a set of expressive means that can be added to EL without sacrificing tractability. On the other hand, we show that basically all other additions of typical DL constructors to EL with GCIs make subsumption intractable, and in most cases even EXPTIMEcomplete. In addition, we show that subsumption in FL0 with GCIs is EXPTIME-complete.

Extracted Key Phrases

2 Figures and Tables

050100150'04'06'08'10'12'14'16
Citations per Year

1,183 Citations

Semantic Scholar estimates that this publication has 1,183 citations based on the available data.

See our FAQ for additional information.

Cite this paper

@inproceedings{Baader2005PushingTE, title={Pushing the EL Envelope}, author={Franz Baader and Sebastian Brandt and Carsten Lutz}, booktitle={IJCAI}, year={2005} }