4180 search results - page 115 / 836 » A Query Language for XML |
226
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PODS
2009
ACM
16 years 4 months ago
2009
ACM
In this work we investigate the satisfiability problem for the logic XPath( , , =), that includes all downward axes as well as equality and inequality tests. We address this probl...
210
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SIGMOD
2008
ACM
16 years 4 months ago
2008
ACM
XML database systems are expected to handle increasingly complex queries over increasingly large and highly structured XML databases. An important problem that needs to be solved ...
120
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WWW
2005
ACM
16 years 4 months ago
2005
ACM
Constructing and maintaining semantic mappings are necessary but troublesome in data sharing systems. While most current work focuses on seeking automated techniques to solve this...
149
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SDMW
2007
Springer
15 years 10 months ago
2007
Springer
Abstract. We investigate the experimental effectiveness of query rewriting over XML security views. Our model consists of access control policies specified over DTDs with XPath e...
128
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DASFAA
2004
IEEE
15 years 7 months ago
2004
IEEE
Abstract. We consider the problem of accurately estimating the number of approximate XML answers for a given query, and propose an efficient method that (1) accurately computes sel...