16 results on '"Leonid Libkin"'
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2. Fragments of Bag Relational Algebra: Expressiveness and Certain Answers.
3. SQL's Three-Valued Logic and Certain Answers.
4. Querying graph databases with XPath.
5. Containment of pattern-based queries over data trees.
6. Regular path queries on graphs with data.
7. On the complexity of query answering over incomplete XML documents.
8. Efficient reasoning about data trees via integer linear programming.
9. On the tradeoff between mapping and querying power in XML data exchange.
10. On the aggregation problem for synthesized web services.
11. Combining Temporal Logics for Querying XML Documents.
12. Expressive Power of SQL.
13. Local Properties of Query Languages.
14. Tractable Iteration Mechanisms for Bag Languages.
15. Approximation in Databases.
16. Database Theory - ICDT 2005, 10th International Conference, Edinburgh, UK, January 5-7, 2005, Proceedings
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