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PODS
2004
ACM
120views Database» more  PODS 2004»
14 years 6 months ago
Locally Consistent Transformations and Query Answering in Data Exchange
Data exchange is the problem of taking data structured under a source schema and creating an instance of a target schema. Given a source instance, there may be many solutions ? ta...
Marcelo Arenas, Pablo Barceló, Ronald Fagin...
DOLAP
2004
ACM
13 years 11 months ago
Aggregate queries in peer-to-peer OLAP
A peer-to-peer (P2P) data management system consists essentially of a network of peer systems, each maintaining full autonomy over its own data resources. Data exchange between pe...
Mauricio Minuto Espil, Alejandro A. Vaisman
SIGMOD
2004
ACM
198views Database» more  SIGMOD 2004»
14 years 6 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
TOOLS
2008
IEEE
14 years 20 days ago
Guarded Program Transformations Using JTL
There is a growing research interest in employing the logic paradigm for making queries on software in general, and OOP software in particular. We describes a side-effect-free tech...
Tal Cohen, Joseph Gil, Itay Maman
ICDE
2005
IEEE
131views Database» more  ICDE 2005»
14 years 7 months ago
On the Sequencing of Tree Structures for XML Indexing
Sequence-based XML indexing aims at avoiding expensive join operations in query processing. It transforms structured XML data into sequences so that a structured query can be answ...
Haixun Wang, Xiaofeng Meng