7865 search results - page 442 / 1573 » Peer-to-Peer Data Management |
180
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GLOBE
2009
Springer
15 years 11 months ago
2009
Springer
Abstract. We show how to specify and use the metadata for a virtual and relational data integration system under the local-as-view (LAV) approach. We use XML and RuleML for represe...
178
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DAWAK
1999
Springer
15 years 11 months ago
1999
Springer
A Data Warehouse DW can be abstractly seen as a set of materialized views de ned over relations that are stored in distributed heterogeneous databases. The selection of views for...
156
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SIGIR
1996
ACM
15 years 11 months ago
1996
ACM
We present a deductive data model for concept-based query expansion. It is based abstraction levels: the conceptual, the expression and the occurrence level. Concepts and their re...
204
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CIKM
1994
Springer
15 years 11 months ago
1994
Springer
Accessing information sources to retrieve data requested by a user can be expensive, especially when dealing with distributed information sources. One way to reduce this cost is t...
184
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ER
2007
Springer
15 years 10 months ago
2007
Springer
Data Warehouse (DWH) systems represent a single source of information for analyzing the status, the development and the results of an organization. Today's DWH systems provide...