217 search results - page 11 / 44 » An optimization for query answering on ALC database |
VLDB
1987
ACM
13 years 11 months ago
1987
ACM
Severalmethodshavebeenproposedto compile recursive Datalog programs. The most well-known perform a rewriting of rules using MAGIC or PROBLEM predicates in order to push selections...
VLDB
2011
ACM
13 years 2 months ago
2011
ACM
Schema mappings are high-level specifications that describe the relationship between two database schemas. They are an important tool in several areas of database research, notab...
ICDE
2008
IEEE
14 years 8 months ago
2008
IEEE
Text documents often embed data that is structured in nature, and we can expose this structured data using information extraction technology. By processing a text database with inf...
ICDT
2012
ACM
11 years 10 months ago
2012
ACM
The problems of query containment, equivalence, and minimization are recognized as very important in the context of query processing, specifically of query optimization. In their...
ICDE
2007
IEEE
14 years 1 months ago
2007
IEEE
Privacy is a serious concern when microdata need to be released for ad hoc analyses. The privacy goals of existing privacy protection approaches (e.g., -anonymity and -diversity) ...