16 search results - page 1 / 4 » Semantic Query Optimisation and Rule Graphs |
KRDB
1998
13 years 6 months ago
1998
Previous researchers note the problem for semantic optimisation of database queries caused by its production of a large number of semantically equivalent alternative queries, from...
ISMIS
1999
Springer
13 years 9 months ago
1999
Springer
Semantic Query Optimisation makes use of the semantic knowledge of a database (rules) to perform query transformation. Rules are normally learned from former queries fired by the u...
WWW
2008
ACM
14 years 6 months ago
2008
ACM
Easy reuse and integration of declaratively described information in a distributed setting is one of the main motivations for building the Semantic Web. Despite of this claim, reu...
FQAS
2009
Springer
14 years 19 hour ago
2009
Springer
We consider the problem of finding and ranking paths in semistructured data without necessarily knowing its full structure. The query language we adopt comprises conjunctions of r...
PPSWR
2005
Springer
13 years 11 months ago
2005
Springer
We present typing rules for the Web query language Xcerpt. The rules provide a descriptive type system: the typing of a program is an ation of its semantics. The rules can also be ...