Dichotomies in Ontology-Mediated Querying with the Guarded Fragment
Summary: Classifies data complexity of ontology-mediated querying for guarded-fragment ontologies, identifying large GF fragments that admit a PTIME vs coNP dichotomy (some supporting counting) and showing most BioPortal ontologies fit or are easily rewritable into them. Shows impossibility of a dichotomy for other fragments via a Ladner-style NP-intermediate construction, ties a dichotomy for full GF to the Feder–Vardi CSP conjecture, and gives positive and negative results on Datalog-rewritability and decidability of PTIME query evaluation per ontology. (summarized by gpt-5-mini on Feb 09 2026)
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Authors
- 1. André Hernich (University of Liverpool)
- 2. Carsten Lutz (University of Bremen)
- 3. Fabio Papacchini (University of Liverpool)
- 4. Frank Wolter (University of Liverpool)
BibTeX Citation
@inproceedings{hernich_pods17,
address = {New York, NY, USA},
series = {{PODS} '17},
title = {{Dichotomies in Ontology-Mediated Querying with the Guarded Fragment}},
url = {https://dl.acm.org/doi/10.1145/3034786.3056108},
doi = {10.1145/3034786.3056108},
booktitle = {Proceedings of the {ACM} {SIGMOD} Symposium on {Principles} of {Database} {Systems}},
publisher = {Association for Computing Machinery},
author = {Hernich, André and Lutz, Carsten and Papacchini, Fabio and Wolter, Frank},
year = {2017}
}Incoming Citations (Sorted by Pagerank)
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| Rank | Citing Paper | Year | Venue | Pagerank |
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Outgoing Citations (Sorted by Pagerank)
Showing 8 of 8 cited papers.
Citations counted here include only citations to other VLDB/SIGMOD/CIDR/PODS papers in this database.
| Rank | Cited Paper | Year | Venue | Pagerank |
|---|---|---|---|---|
| 540 | The Chase Revisited | 2008 | PODS | 0.00016674946 |
| 1,667 | On the Decidability of Query Containment under Constraints | 1998 | PODS | 9.922321e-05 |
| 1,747 | The Data Complexity of Consistent Query Answering for Self-Join-Free Conjunctive Queries Under Primary Key Constraints | 2015 | PODS | 9.7180424e-05 |
| 2,759 | Dichotomies in the Complexity of Preferred Repairs | 2015 | PODS | 8.0269594e-05 |
| 4,085 | The Complexity of Resilience and Responsibility for Self-Join-Free Conjunctive Queries | 2016 | VLDB | 6.7989526e-05 |
| 4,533 | View-Based Query Containment | 2003 | PODS | 6.540906e-05 |
| 5,497 | Ontology-based Data Access: A Study through Disjunctive Datalog, CSP, and MMSNP | 2013 | PODS | 6.0936325e-05 |
| 6,006 | A Dichotomy in the Complexity of Deletion Propagation with Functional Dependencies | 2012 | PODS | 5.9002327e-05 |
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