496 search results - page 94 / 100 » Schema Mediation in Peer Data Management Systems |
DBPL
2003
Springer
14 years 21 days ago
2003
Springer
Abstract. In the context of XML data management systems, the estimation of query cardinality is becoming more and more important: the information provided by a query result estimat...
VLDB
2002
ACM
13 years 7 months ago
2002
ACM
Star queries are the most prevalent kind of queries in data warehousing, OLAP and business intelligence applications. Thus, there is an imperative need for efficiently processing ...
SIGMOD
2008
ACM
14 years 7 months ago
2008
ACM
While database management systems offer a comprehensive solution to data storage, they require deep knowledge of the schema, as well as the data manipulation language, in order to...
PODS
2010
ACM
14 years 17 days ago
2010
ACM
The notion of certain answers arises when one queries incompletely specified databases, e.g., in data integration and exchange scenarios, or databases with missing information. W...
SACMAT
2006
ACM
14 years 1 months ago
2006
ACM
In this paper we propose an access control model for the Resource Description Framework (RDF). We argue that existing access control models, like the ones developed for securing e...