142 search results - page 29 / 29 » On Conjunctive Query Answering in EL |
DLOG
2009
13 years 3 months ago
2009
Abstract. Model-based most specific concepts are a non-standard reasoning service in Description Logics. They have turned out to be useful in knowledge base completion for ontologi...
ICDT
2010
ACM
14 years 3 months ago
2010
ACM
It is known that the composition of schema mappings, each specified by source-to-target tgds (st-tgds), can be specified by a secondorder tgd (SO tgd). We consider the question of...