- Abstract:
- While conjunctive query (CQ) answering over DL-Lite has been studied extensively, there have been few attempts to analyse CQs with negated atoms. This paper deepens the study of the problem. Answering CQs with safe negation and CQs with a single inequality over DL-Lite with role inclusions is shown to be undecidable, even for a fixed TBox and query.Without role inclusions, answering CQs with one inequality is P-hard and with two inequalities coNP-hard in data complexity. © 2013 Springer-Verlag.
- Publication status:
- Published
- Version:
- Accepted Manuscript
- Files:
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(pdf, 296.4KB)
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- Publisher copy:
- 10.1007/978-3-642-39666-3_9
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- Publisher:
- Springer Publisher's website
- Series:
- Lecture Notes in Computer Science
- Publication date:
- 2013-08-12
- DOI:
- ISSN:
-
0302-9743
- Pubs id:
-
pubs:550203
- URN:
-
uri:164c9a14-ac75-416e-9ffe-ecaffbb657bb
- UUID:
-
uuid:164c9a14-ac75-416e-9ffe-ecaffbb657bb
- Local pid:
- pubs:550203
- ISBN:
- 9783642396656
- Keywords:
- Copyright holder:
- ©Springer-Verlag Berlin Heidelberg 2013
- Copyright date:
- 2013
- Notes:
- This is the author accepted manuscript version of the article. The final version is available online from Springer at: https://doi.org/10.1007/978-3-642-39666-3_9
Conference item
Conjunctive queries with negation over DL-Lite: A closer look
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