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JAPLL
2010
104views more  JAPLL 2010»
13 years 5 months ago
Complete axiomatizations for XPath fragments
We provide complete axiomatizations for several fragments of XPath: sets of equivalences from which every other valid equivalence is derivable. Specifically, we axiomatize downwar...
Balder ten Cate, Tadeusz Litak, Maarten Marx
JOLLI
2010
94views more  JOLLI 2010»
13 years 5 months ago
Querying Linguistic Trees
Large databases of linguistic annotations are used for testing linguistic hypotheses and for training language processing models. These linguistic annotations are often syntactic ...
Catherine Lai, Steven Bird
DS
1997
97views Database» more  DS 1997»
13 years 8 months ago
A Formalization of ODMG Queries
The ODMG proposal has helped to focus the work on object-oriented databases (OODBs) onto a common object model and query language. Nevertheless there are several shortcomings of t...
Holger Riedel, Marc H. Scholl
JAPLL
2010
98views more  JAPLL 2010»
13 years 5 months ago
On database query languages for K-relations
The relational model has recently been extended to so-called K-relations in which tuples are assigned a unique value in a semiring K. A query language, denoted by RAC K , similar ...
Floris Geerts, Antonella Poggi
ESOP
2008
Springer
13 years 9 months ago
Regular Expression Subtyping for XML Query and Update Languages
Abstract. XML database query languages such as XQuery employ regular expression types with structural subtyping. Subtyping systems typically have two presentations, which should be...
James Cheney