Satisfiability of Downward XPath with Data Equality Tests
Summary: Proves satisfiability of downward XPath with data equality/inequality (descendant*, child, =) is decidable and ExpTime-complete, even with Kleene-star and without DTDs or the sibling axis. Introduces a novel data-tree automaton with ExpTime emptiness and pins exact complexities of several downward fragments. (summarized by gpt-5-mini on Feb 09 2026)
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| Rank | Citing Paper | Year | Venue | Pagerank |
|---|---|---|---|---|
| 8,199 | On XPath with Transitive Axes and Data Tests | 2013 | PODS | 4.5558541e-05 |
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Citations counted here include only citations to other VLDB/SIGMOD/CIDR/PODS papers in this database.
| Rank | Cited Paper | Year | Venue | Pagerank |
|---|---|---|---|---|
| 3,852 | The Expressivity of XPath with Transitive Closure* | 2006 | PODS | 6.6993728e-05 |
| 4,076 | Two-Variable Logic on Data Trees and XML Reasoning | 2006 | PODS | 6.4657154e-05 |
| 6,153 | XPath, Transitive Closure Logic, and Nested Tree Walking Automata | 2008 | PODS | 5.1796878e-05 |
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