17 search results - page 2 / 4 » On First-Order Query Rewriting for Incomplete Database Histo... |
VLDB
2007
ACM
14 years 4 months ago
2007
ACM
Incompleteness due to missing attribute values (aka "null values") is very common in autonomous web databases, on which user accesses are usually supported through media...
SIGMOD
2007
ACM
14 years 4 months ago
2007
ACM
Incomplete information arises naturally in numerous data management applications. Recently, several researchers have studied query processing in the context of incomplete informat...
JAPLL
2010
13 years 3 months ago
2010
Answering queries over an incomplete database w.r.t. a set of constraints is an important computational task with applications in fields as diverse as information integration and ...
ER
2008
Springer
13 years 6 months ago
2008
Springer
Modern information systems, and web information systems in particular, are faced with frequent database schema changes, which generate the necessity to manage them and preserve the...
VLDB
1995
ACM
13 years 8 months ago
1995
ACM
We present a shape definition language, called SDC, for retrieving objects based on shapes contained in the histories associated with these objects. It is a small, yet powerful, l...