617 search results - page 74 / 124 » Semantic queries in databases: problems and challenges |
VLDB
2005
ACM
14 years 9 months ago
2005
ACM
Abstract Declarative queries are proving to be an attractive paradigm for interacting with networks of wireless sensors. The metaphor that "the sensornet is a database" i...
EDBT
2012
ACM
11 years 11 months ago
2012
ACM
Query optimization in RDF Stores is a challenging problem as SPARQL queries typically contain many more joins than equivalent relational plans, and hence lead to a large join orde...
WWW
2011
ACM
13 years 3 months ago
2011
ACM
The problem of answering SPARQL queries over virtual SPARQL views is commonly encountered in a number of settings, including while enforcing security policies to access RDF data, ...
VLDB
2005
ACM
14 years 2 months ago
2005
ACM
RFID technology can be used to significantly improve the efficiency of business processes by providing the capability of automatic identification and data capture. This technol...
TDM
2004
13 years 10 months ago
2004
This paper examines the use of XML for modern extractionbased question answering (QA). We feel that the XML community has taken too narrow a view of structured retrieval, and that...