6974 search results - page 42 / 1395 » Querying Semi-Structured Data |
EDBT
2008
ACM
14 years 8 months ago
2008
ACM
For complex data mining queries, query optimization issues arise, similar to those for the traditional database queries. However, few works have applied the cost-based query optim...
WSDM
2010
ACM
14 years 5 months ago
2010
ACM
Query reformulation techniques based on query logs have been studied as a method of capturing user intent and improving retrieval effectiveness. The evaluation of these techniques...
SIGMOD
2005
ACM
14 years 8 months ago
2005
ACM
Window queries are proving essential to data-stream processing. In this paper, we present an approach for evaluating sliding-window aggregate queries that reduces both space and c...
WISE
2009
Springer
14 years 5 months ago
2009
Springer
ct One significant effort towards combining the virtues of Web search, viz. being accessible to untrained users and able to cope with vastly heterogeneous data, with those of dat...
BTW
2005
Springer
14 years 1 months ago
2005
Springer
: Access control is an important aspect in guaranteeing data privacy within XML data sources which are accessed by users with different access rights. The goal of predicative acces...