617 search results - page 45 / 124 » Semantic queries in databases: problems and challenges |
WEBDB
2005
Springer
14 years 2 months ago
2005
Springer
Efficient query processing in P2P-based Web integration systems poses a variety of challenges resulting from the strict decentralization and limited knowledge. As a special probl...
EDBT
2012
ACM
11 years 11 months ago
2012
ACM
With the popularization of GPS-enabled devices there is an increasing interest for location-based queries. In this context, one interesting problem is processing top-k spatial key...
WWW
2010
ACM
14 years 3 months ago
2010
ACM
In this paper, we address the problem of database selection for XML document collections, that is, given a set of collections and a user query, how to rank the collections based o...
SIGMOD
2004
ACM
14 years 9 months ago
2004
ACM
Querying XML data is a well-explored topic with powerful databasestyle query languages such as XPath and XQuery set to become W3C standards. An equally compelling paradigm for que...
IDEAS
2002
IEEE
14 years 1 months ago
2002
IEEE
Boolean expression simplification is a well-known problem in the history of Computer Science. The problem of determining prime implicates from an arbitrary Boolean expression has...