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100
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NAACL
2010
14 years 10 months ago
2010
The use of well-nested linear context-free rewriting systems has been empirically motivated for modeling of the syntax of languages with discontinuous constituents or relatively f...
136
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DBPL
1993
Springer
15 years 4 months ago
1993
Springer
In this paper we study the expressive power of query languages for nested bags. We de ne the ambient bag language by generalizing the constructs of the relational language of Brea...
211
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ICDE
2009
IEEE
16 years 2 months ago
2009
IEEE
Adaptive join algorithms have recently attracted a lot of attention in emerging applications where data is provided by autonomous data sources through heterogeneous network enviro...
123
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ICDE
2005
IEEE
15 years 6 months ago
2005
IEEE
— XQuery, the defacto XML query language, is a functional language with operational semantics, which precludes the direct application of classical query optimization techniques. ...
INFORMATICALT
2002
15 years 1 days ago
2002
This article presents the ways of identification, selection and transformation of the data into other structures. Relation selection and transformation may change data quantity and...