2724 search results - page 249 / 545 » Optimizing Queries on Files |
173
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SIGIR
2012
ACM
13 years 6 months ago
2012
ACM
Versioned document collections are collections that contain multiple versions of each document. Important examples are Web archives, Wikipedia and other wikis, or source code and ...
162
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ADL
2000
Springer
15 years 8 months ago
2000
Springer
We address the problem of tight XML schemas and propose regular tree automata to model XML data. We show that the tree automata model is more powerful that the XML DTDs and is clo...
134
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VLDB
1989
ACM
15 years 8 months ago
1989
ACM
: We describe the architecture of a relational databasesystem that is extensible by user-defined data types and operations, including relation operations. The central concept is to...
144
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PVLDB
2008
15 years 3 months ago
2008
We study the problem of extracting flattened tuple data from streaming, hierarchical XML data. Tuple-extraction queries are essentially XML pattern queries with multiple extractio...
266
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ICDE
2007
IEEE
16 years 5 months ago
2007
IEEE
Incompleteness due to missing attribute values (aka "null values") is very common in autonomous web databases, on which user accesses are usually supported through media...