448 search results - page 36 / 90 » Queries and Constraints on Semi-structured Data |
155
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VLDB
2006
ACM
15 years 10 months ago
2006
ACM
In this paper we study the following problem. Given a database and a set of queries, we want to find a set of views that can compute the answers to the queries, such that the amoun...
99
Voted
CIKM
2006
Springer
15 years 1 months ago
2006
Springer
In an uncertain database, each data item is modeled as a range associated with a probability density function. Previous works for this kind of data have focussed on simple queries...
SAC
2009
ACM
15 years 2 months ago
2009
ACM
The XML has undoubtedly become a standard for data representation and manipulation. But most of XML documents are still created without the respective description of their structu...
101
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DBPL
2001
Springer
15 years 2 months ago
2001
Springer
Abstract. We address a fundamental question concerning spatio-temporal database systems: “What are exactly spatio-temporal queries?” We define spatio-temporal queries to be co...
VLDB
2005
ACM
15 years 3 months ago
2005
ACM
SQL extensions that allow queries to explicitly specify data quality requirements in terms of currency and consistency were proposed in an earlier paper. This paper develops a dat...