By Matthias Klusch, Sonia Bergamaschi, Pete Edwards, Paolo Petta
This booklet offers 10 chapters on numerous features of clever details brokers contributed by way of participants of the respective AgentLink targeted curiosity group.
The papers are geared up in 3 elements on agent-based details structures, adaptive info brokers, and coordination of data brokers. additionally integrated are a finished creation and surveys for every of the 3 elements.
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Additional info for Intelligent Information Agents: The AgentLink Perspective
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Dynamic Service Matchmaking Among Agents in Open Information Environments. SIGMOD Record, 28(1), 47– 53, 1999. 62. K. Sycara. In-context information management through adaptative collaboration of intelligent agents. Intelligent Information Agents editor M. Klusch, 78–99, 1999. 63. D. Beneventano, S. Bergamaschi, S. Castano, A. Corni, R. Guidetti, G. Malvezzi, M. Melchiori, M. Vincini Information Integration: The MOMIS Project Demonstration. VLDB 2000, in proceedings of 26th International Conference on Very Large Data Bases, 2000, Egypt.
Agents perform activities for manipulating global queries to create queries at lower level of abstraction (local queries) that are hence executable on data sources. Local answers have then to be synthesised into a global answer. Notice while the integration process is essentially a oneway bottom-up information flow starting from the source contents and ending up with the generation of a GVV, the querying phase is a two-way process: top-down when users submit queries over the GVV and bottom-up when local answer are made available and have to be merged to compose the global answer.
The use of a global schema allows both GARLIC and SIMS projects to support every possible user queries on the schema instead of a predefined subset of them. The Information Manifold system [16] provides a source independent and query independent mediator. The input schema of Information Manifold is a set of descriptions of the sources. Given a query, the system will create a plan for answering the query using the underlying source descriptions. Algorithms to decide the useful information sources and to generate the query plan have been implemented.