18 results on '"Gyssens, Marc"'
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2. Comparing the expressiveness of downward fragments of the relation algebra with transitive closure on trees
3. Relative expressive power of navigational querying on graphs
4. On the conditional independence implication problem: A lattice-theoretic approach
5. Logical and algorithmic properties of stable conditional independence
6. A methodology for coupling fragments of XPath with structural indexes for XML documents
7. Typechecking top-down XML transformations: Fixed input or output schemas
8. The implication problem for measure-based constraints
9. Equivalence and Normal Forms for the Restricted and Bounded Fixpoint in the Nested Algebra
10. On the expressiveness of linear-constraint query languages for spatial databases
11. Complete Geometric Query Languages
12. On the Decidability of Semilinearity for Semialgebraic Sets and Its Implications for Spatial Databases
13. Object histories which avoid certain subsequences
14. A comparison between algebraic query languages for flat and nested databases
15. On a hierarchy of classes for nested databases
16. An alternative way to represent the cogroup of a relation in the context of nested databases
17. Decomposing constraint satisfaction problems using database techniques
18. Database management with dBASE and SQL: A practical introduction: Hans Pruyt (translated by Mike Lewis) Chapman & Hall, London (1993) 232 pp £19.95 ISBN 0 412 47750 5
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