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Erschienen in:
2006 | OriginalPaper | Buchkapitel
Adaptive Query-Based Sampling of Distributed Collections
verfasst von : Mark Baillie, Leif Azzopardi, Fabio Crestani
Erschienen in: String Processing and Information Retrieval
Verlag: Springer Berlin Heidelberg
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As part of a Distributed Information Retrieval system a description of each remote information resource, archive or repository is usually stored centrally in order to facilitate resource selection. The acquisition of precise resource descriptions is therefore an important phase in Distributed Information Retrieval, as the quality of such representations will impact on selection accuracy, and ultimately retrieval performance. While Query-Based Sampling is currently used for content discovery of uncooperative resources, the application of this technique is dependent upon heuristic guidelines to determine when a sufficiently accurate representation of each remote resource has been obtained. In this paper we address this shortcoming by using the Predictive Likelihood to provide both an indication of the quality of an acquired resource description estimate, and when a sufficiently good representation of a resource has been obtained during Query-Based Sampling.