2025
Answering Conjunctive Queries with Safe Negation and Inequalities over RDFS Knowledge Bases
AAAI 2025technical
Expressing negative conditions is a crucial feature of query languages for knowledge bases (KBs). Answering such queries over ontological KBs, however, is a very challenging task that becomes undecidable even for lightweight Description Logic (DL) ontologies. Such negative results hold even for Conj…