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EL++ is a lightweight description logic that was designed to

  • capture the expressive power that is used by large-scale ontologies from practical applications
  • have polytime reasoning problems, in particular classification and instance checking

(www.w3.org 2010)

EL++ has been incorporated into OWL 2 as a OWL 2 EL Profile.


  • Franz Baader, Sebastian Brandt, Carsten Lutz: Pushing the EL Envelope. IJCAI 2005: 364-369