From Conjunctive Queries to Instance Queries in Ontology-Mediated Querying
Abstract
We consider ontology-mediated queries (OMQs) based on expressive description logics of the ALC family and (unions) of conjunctive queries, studying the rewritability into OMQs based on instance queries (IQs). Our results include exact characterizations of when such a rewriting is possible and tight complexity bounds for deciding rewritability. We also give a tight complexity bound for the related problem of deciding whether a given MMSNP sentence (in other words: the complement of a monadic disjunctive Datalog program) is equivalent to a constraint satisfaction problem.
Cite
Text
Feier et al. "From Conjunctive Queries to Instance Queries in Ontology-Mediated Querying." International Joint Conference on Artificial Intelligence, 2018. doi:10.24963/IJCAI.2018/250Markdown
[Feier et al. "From Conjunctive Queries to Instance Queries in Ontology-Mediated Querying." International Joint Conference on Artificial Intelligence, 2018.](https://mlanthology.org/ijcai/2018/feier2018ijcai-conjunctive/) doi:10.24963/IJCAI.2018/250BibTeX
@inproceedings{feier2018ijcai-conjunctive,
title = {{From Conjunctive Queries to Instance Queries in Ontology-Mediated Querying}},
author = {Feier, Cristina and Lutz, Carsten and Wolter, Frank},
booktitle = {International Joint Conference on Artificial Intelligence},
year = {2018},
pages = {1810-1816},
doi = {10.24963/IJCAI.2018/250},
url = {https://mlanthology.org/ijcai/2018/feier2018ijcai-conjunctive/}
}