EL++ is a lightweight description logic that was designed to <blockquote>
- capture the expressive power that is used by large-scale ontologies from practical applications
- have polytime reasoning problems, in particular classification and instance checking
<sub>(www.w3.org 2010)</sub> </blockquote>
EL++ has been incorporated into OWL 2 as a OWL 2 EL Profile.
References
- Franz Baader, Sebastian Brandt, Carsten Lutz: Pushing the EL Envelope. IJCAI 2005: 364âÂÂ369