25 search results - page 4 / 5 » Query containment and rewriting using views for regular path... |
DBPL
2009
Springer
13 years 11 months ago
2009
Springer
In this paper, we revisit the view based security framework for XML without imposing any of the previously considered restrictions on the class of queries, the class of DTDs, and t...
AICOM
2004
13 years 5 months ago
2004
Abstract. We address the problem of answering queries using expressive symmetric inter-schema constraints which allow to establish mappings between several heterogeneous informatio...
SIGMOD
2004
ACM
14 years 5 months ago
2004
ACM
The prevalent use of XML highlights the need for a generic, flexible access-control mechanism for XML documents that supports efficient and secure query access, without revealing ...
PVLDB
2010
13 years 3 months ago
2010
Supporting legacy applications when the database schema evolves represents a long-standing challenge of practical and theoretical importance. Recent work has produced algorithms a...
DKE
2006
13 years 5 months ago
2006
The last few years, there has been an extensive body of literature in data warehousing applications that primarily focuses on basket-type (transactional) data, common in retail in...