Containment in Monadic Disjunctive Datalog, MMSNP, and Expressive Description Logics
Containment in Monadic Disjunctive Datalog, MMSNP, and Expressive Description Logics
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单子析取数据记录、MMSNP 和表达描述逻辑中的遏制
DOI:
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发表时间:
2016
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通讯作者:
C. Lutz
中科院分区:
文献类型:
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作者:
P. Bourhis;C. Lutz
We study query containment in three closely related formalisms: monadic disjunctive Datalog (MDDLog), MMSNP (a logical generalization of constraint satisfaction problems), and ontology-mediated queries (OMQs) based on expressive description logics and unions of conjunctive queries. Containment in MMSNP was known to be decidable due to a result by Feder and Vardi, but its exact complexity has remained open. We prove 2NExpTime-completeness and extend this result to monadic disjunctive Datalog and to OMQs.