53 search results - page 7 / 11 » Leveraging the Expressivity of Grounded Conjunctive Query La... |
PVLDB
2010
14 years 7 months ago
2010
Ontology-based data access is a powerful form of extending database technology, where a classical extensional database (EDB) is enhanced by an ontology that generates new intensio...
138
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EDBT
2008
ACM
15 years 9 months ago
2008
ACM
Data exchange is the problem of transforming data structured under a schema (called source) into data structured under a different schema (called target). The emphasis of data exc...
ICDT
2005
ACM
15 years 2 months ago
2005
ACM
We give two sufficient conditions on XPath like languages for having first order expressivity, meaning that every first order definable set of paths in an ordered node-labeled t...
100
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AIIA
2007
Springer
15 years 3 months ago
2007
Springer
A procedure founded in instance-based learning is presented, for performing a form of analogical reasoning on knowledge bases expressed in a wide range of ontology languages. The p...
ESWS
2009
Springer
15 years 4 months ago
2009
Springer
We consider the problem of a user querying semistructured data such as RDF without knowing its structure. In these circumstances, it is helpful if the querying system can perform a...