642 search results - page 39 / 129 » Answering XML Queries on Heterogeneous Data Sources |
DBSEC
2003
13 years 10 months ago
2003
Abstract Data integrity can be problematic when integrating and organizing information from many sources. In this paper we describe efficient mechanisms that enable a group of data...
ESWS
2008
Springer
13 years 10 months ago
2008
Springer
Integrated access to multiple distributed and autonomous RDF data sources is a key challenge for many semantic web applications. As a reaction to this challenge, SPARQL, the W3C Re...
AWIC
2005
Springer
14 years 2 months ago
2005
Springer
In data integration systems there is a problem of answering queries through a target schema, given a set of mappings between source schemas and the target schema, and given that th...
ICDE
2008
IEEE
14 years 10 months ago
2008
IEEE
Data sources on the web are often accessible through web interfaces that present them as relational tables, but require certain attributes to be mandatorily selected, e.g., via a w...
JFP
2006
13 years 8 months ago
2006
A part of a query that will never contribute data to the query answer should be regarded as an error. This principle has been recently accepted into mainstream XML query languages...