448 search results - page 5 / 90 » Queries and Constraints on Semi-structured Data |
EDBTW
2004
Springer
15 years 3 months ago
2004
Springer
The problem of answering queries posed to a peer who is a member of a peer-to-peerdataexchangesystemisstudied.Theanswershavetobeconsistentwrt to both the local semantic constraints...
ICDE
2011
IEEE
14 years 1 months ago
2011
IEEE
—Complex SQL queries are widely used today, but it is rather difficult to check if a complex query has been written correctly. Formal verification based on comparing a specifi...
SIGMOD
2004
ACM
15 years 9 months ago
2004
ACM
We study the problem of answering queries through a target schema, given a set of mappings between one or more source schemas and this target schema, and given that the data is at...
CDB
2004
Springer
15 years 1 months ago
2004
Springer
Abstract. Constraint databases that can be described by boolean combinations of polynomial inequalities over the reals have received ample research attention. In particular, the ex...
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ICDE
1999
IEEE
15 years 11 months ago
1999
IEEE
We develop a data integration approach for the efficient evaluation of queries over autonomous source databases. The approach is based on some novel applications and extensions of...