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ENTCS
2006
133views more  ENTCS 2006»
13 years 10 months ago
A Data Model for Data Integration
Data integration systems provide a uniform query interface (UQI) to multiple, autonomous data sources [4]. This paper presents the universal data model (UDM) that captures the sem...
James J. Lu
SIGMOD
2004
ACM
198views Database» more  SIGMOD 2004»
14 years 10 months ago
Secure XML Querying with Security Views
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 ...
Wenfei Fan, Chee Yong Chan, Minos N. Garofalakis
XSYM
2004
Springer
108views Database» more  XSYM 2004»
14 years 3 months ago
XIST: An XML Index Selection Tool
XML indices are essential for efficiently processing XML queries which typically have predicates on both structures and values. Since the number of all possible structural and val...
Kanda Runapongsa, Jignesh M. Patel, Rajesh Bordawe...
IDEAS
2007
IEEE
118views Database» more  IDEAS 2007»
14 years 4 months ago
A Two Layered Approach for Querying Integrated XML Sources
The problem of data integration (query decomposition, data fragmentation) has been widely studied in literature, but the inherent hierarchical nature of XML data presents problems...
Felipe Victolla Silveira, Carlos A. Heuser
WEBDB
2004
Springer
125views Database» more  WEBDB 2004»
14 years 3 months ago
Best-Match Querying from Document-Centric XML
On the Web, there is a pervasive use of XML to give lightweight semantics to textual collections. Such documentcentric XML collections require a query language that can gracefully...
Jaap Kamps, Maarten Marx, Maarten de Rijke, Bö...