281 search results - page 42 / 57 » Querying the Guarded Fragment |
FOSSACS
2009
Springer
15 years 5 months ago
2009
Springer
Abstract. Graph logic (GL) is a spatial logic for querying graphs introduced by Cardelli et al. It has been observed that in terms of expressive power, this logic is a fragment of ...
DASFAA
2006
IEEE
15 years 4 months ago
2006
IEEE
Keyword search is an effective approach for most users to search for information because they do not need to learn complex query languages or the underlying structures of the data....
98
Voted
ICDT
2005
ACM
15 years 3 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...
WEBDB
2005
Springer
15 years 3 months ago
2005
Springer
Nonrecursive XQuery is known to be hard for nondeterministic exponential time. Thus it is commonly believed that any algorithm for evaluating XQuery has to require exponential amo...
89
Voted
ICEIS
2003
IEEE
15 years 3 months ago
2003
IEEE
Abstract: The work described in this article arises from two needs. First, there is still a need for providing more sophisticated database systems than just relational ones. Second...