On the entailment problem for DL-Lite$_{core}$ ontologies and conjunctive queries with negation

Jerzy Marcinkowski; Piotr Ostropolski-Nalewaja

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arXiv · 2510.23490

On the entailment problem for DL-Lite$_{core}$ ontologies and conjunctive queries with negation

Jerzy Marcinkowski·Piotr Ostropolski-Nalewaja

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Abstract

We show that the entailment problem, for a given entailment problem for DL-Lite$_{core}$ ontology, and given conjunctive query with inequalities, is undecidable. We also show that this problem remains undecidable if conjunctive queries with safe negation are considered instead of conjunctive queries with inequalities.

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Jerzy Marcinkowski, Piotr Ostropolski-Nalewaja. 2025-10-27. On the entailment problem for DL-Lite$_{core}$ ontologies and conjunctive queries with negation. https://arxiv.org/abs/2510.23490

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