617 search results - page 22 / 124 » Semantic queries in databases: problems and challenges |
CIDR
2011
13 years 10 days ago
2011
For some problems, human assistance is needed in addition to automated (algorithmic) computation. In sharp contrast to existing data management approaches, where human input is ei...
CAISE
2005
Springer
14 years 2 months ago
2005
Springer
Abstract. Recently, the database and AI research communities have paid increased attention to ontologies. The main motivating reason is that ontologies promise solutions for comple...
WEBDB
2005
Springer
14 years 2 months ago
2005
Springer
As a simple XML query language but with enough expressive power, XPath has become very popular. To expedite evaluation of XPath queries, we consider the problem of caching results...
ICDE
2006
IEEE
14 years 2 months ago
2006
IEEE
This paper presents a description of seven systems, which use database technology to both represent knowledge persistently and make scalable queries on it, in the Semantic Web con...
IS
2007
13 years 8 months ago
2007
Preference queries are relational algebra or SQL queries that contain occurrences of the winnow operator (find the most preferred tuples in a given relation). Such queries are pa...