642 search results - page 78 / 129 » Answering XML Queries on Heterogeneous Data Sources |
159
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AMAI
2005
Springer
15 years 6 months 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...
181
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ASWC
2009
Springer
16 years 23 days 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...
164
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EDBT
2002
ACM
16 years 6 months 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...
181
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INEX
2005
Springer
15 years 11 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...
153
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WWW
2007
ACM
16 years 6 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...