Conjunctive Query Answering in the Description Logic EL Using a Relational Database System.

Carsten Lutz David Toman Frank Wolter Conjunctive Query Answering in the Description Logic EL Using a Relational Database System. 2070-2075 2009 IJCAI http://ijcai.org/papers09/Papers/IJCAI09-341.pdf conf/ijcai/2009 db/conf/ijcai/ijcai2009.html#LutzTW09