642 search results - page 78 / 129 » Answering XML Queries on Heterogeneous Data Sources |
100
Voted
AMAI
2005
Springer
15 years 12 days ago
2005
Springer
Mediator systems integrate distributed, heterogeneous and autonomous data sources, but their e ective use requires the solution of hard query optimization problems. This is usuall...
124
Voted
ASWC
2009
Springer
15 years 7 months ago
2009
Springer
Abstract. We consider the problem of designing data wrapping ontologies whose purpose is to describe relational data sources and to provide a semantically enriched access to the un...
101
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EDBT
2002
ACM
16 years 19 days ago
2002
ACM
Abstract. We present a simple query language for XML, which supports hierarchical, Boolean-connected query patterns. The interpretation of a query is founded on cost-based query tr...
114
click to vote
INEX
2005
Springer
15 years 6 months ago
2005
Springer
Retrieving information from heterogeneous data sources in a flexible manner and within a single (database) framework is still a challenge. In this paper we present several extensi...
93
Voted
WWW
2007
ACM
16 years 1 months ago
2007
ACM
Clio is an existing schema-mapping tool that provides user-friendly means to manage and facilitate the complex task of transformation and integration of heterogeneous data such as...