Two-Variable Logic on Data Trees and XML Reasoning
Summary: Decidability of FO^2 satisfiability over data trees when navigation is restricted to child and next-sibling and data comparisons are equality-only. Implies decidability of satisfiability/containment for a data-aware XPath fragment and of implication for unary key/inclusion constraints. (summarized by gpt-5-mini on Feb 09 2026)
Incoming Non-self Citations Over Time
Authors
- 1. Mikołaj Bojańczyk (University of Warsaw)
- 2. Claire David (University of Paris 7)
- 3. Anca Muscholl (University of Paris 7)
- 4. Thomas Schwentick (University of Dortmund)
- 5. Luc Segoufin (INRIA; University of Paris)
BibTeX Citation
@inproceedings{bojanczyk_pods06,
address = {New York, NY, USA},
series = {{PODS} '06},
title = {{Two-Variable Logic on Data Trees and XML Reasoning}},
url = {https://dl.acm.org/doi/10.1145/1142351.1142354},
doi = {10.1145/1142351.1142354},
booktitle = {Proceedings of the {ACM} {SIGMOD} Symposium on {Principles} of {Database} {Systems}},
publisher = {Association for Computing Machinery},
author = {Bojańczyk, Mikołaj and David, Claire and Muscholl, Anca and Schwentick, Thomas and Segoufin, Luc},
year = {2006}
}
Incoming Citations (Sorted by Pagerank)
Showing 5 of 5 citing papers.
| Rank | Citing Paper | Year | Venue | Pagerank |
|---|---|---|---|---|
| 5,425 | GPC: A Pattern Calculus for Property Graphs | 2023 | PODS | 6.223218e-05 |
| 8,417 | XML Schema Mappings | 2009 | PODS | 5.4288691e-05 |
| 12,487 | The Finite Model Theory Toolbox of a Database Theoretician | 2009 | PODS | 5.093636e-05 |
| 12,491 | Satisfiability of Downward XPath with Data Equality Tests | 2009 | PODS | 5.093636e-05 |
| 12,628 | Reasoning about XML Update Constraints | 2007 | PODS | 5.093636e-05 |
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Outgoing Citations (Sorted by Pagerank)
Showing 3 of 3 cited papers.
Citations counted here include only citations to other VLDB/SIGMOD/CIDR/PODS papers in this database.
| Rank | Cited Paper | Year | Venue | Pagerank |
|---|---|---|---|---|
| 666 | Efficient Algorithms for Processing XPath Queries | 2002 | VLDB | 0.00015166582 |
| 1,916 | XPath Satisfiability in the Presence of DTDs | 2005 | PODS | 9.4878711e-05 |
| 3,679 | XML with Data Values: Typechecking Revisited | 2001 | PODS | 7.2045472e-05 |
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