347 search results - page 10 / 70 » Certain answers for XML queries |
AAAI
2007
13 years 11 months ago
2007
The Closed-World Assumption (CWA) on databases expresses that an atom not in the database is false. A more appropriate assumption for databases that are sound but partially incomp...
SAC
2002
ACM
13 years 8 months ago
2002
ACM
We have in a previous paper introduced the new query operators that are needed in order to support an XML query language that supports temporal operations. The query operators mak...
PLANX
2008
13 years 10 months ago
2008
We investigate the complexity of earliest query answering for n-ary node selection queries defined by streaming tree automata (STAs). We elaborate an algorithm that selects query ...
BTW
2005
Springer
14 years 2 months ago
2005
Springer
: Access control is an important aspect in guaranteeing data privacy within XML data sources which are accessed by users with different access rights. The goal of predicative acces...
LPNMR
2009
Springer
14 years 3 months ago
2009
Springer
Abstract. We study the complexity of consistency checking and query answering on incomplete databases for languages ranging from non-recursive Datalog to disjunctive Datalog with n...