1177 search results - page 204 / 236 » A Database of Narrative Schemas |
SIGMOD
2002
ACM
14 years 7 months ago
2002
ACM
Statistics play an important role in influencing the plans produced by a query optimizer. Traditionally, optimizers use statistics built over base tables and assume independence b...
SIGMOD
2001
ACM
14 years 7 months ago
2001
ACM
From the standpoint of satisfying human's informationneeds, the current digital library (DL) systems suffer from the following two shortcomings: (i) inadequate high-level cog...
ICDE
2008
IEEE
14 years 2 months ago
2008
IEEE
— The integration of heterogeneous data sources is one of the main challenges within the area of data engineering. Due to the absence of an independent and universal benchmark fo...
ADC
2008
Springer
14 years 1 months ago
2008
Springer
Several XML query languages have been proposed that use XPath expressions to locate data. But XPath expressions might miss some data because of irregularities in the data and sche...
IDEAS
2007
IEEE
14 years 1 months ago
2007
IEEE
The problem of data integration (query decomposition, data fragmentation) has been widely studied in literature, but the inherent hierarchical nature of XML data presents problems...