167 search results - page 10 / 34 » On the provenance of non-answers to queries over extracted d... |
DILS
2005
Springer
14 years 1 months ago
2005
Springer
For execution of complex biological queries, data integration systems often use several intermediate data sources because the domain coverage of individual sources is limited. Qual...
ICDE
2008
IEEE
14 years 9 months ago
2008
IEEE
Traditional approaches to rule-based information extraction (IE) have primarily been based on regular expression grammars. However, these grammar-based systems have difficulty scal...
VLDB
2002
ACM
13 years 7 months ago
2002
ACM
Many valuable text databases on the web have non-crawlable contents that are "hidden" behind search interfaces. Metasearchers are helpful tools for searching over many s...
ADBIS
2000
Springer
14 years 6 days ago
2000
Springer
Queries involving aggregation are typical in a number of database research areas, such as data warehousing, global information systems and mobile computing. One of the main ideas ...
EMNLP
2009
13 years 5 months ago
2009
There have been increasing needs for task specific rankings in web search such as rankings for specific query segments like long queries, time-sensitive queries, navigational quer...