Citation-Key:
Dreger/etal:98b
Title:
Provider Selection--Design and Implementation of the Medoc Broker
Author(s):
M. Dreger
N. Fuhr
K. Großjohann
S. Lohrum
In:
Citation-Key:
Barth/etal:98
Title:
Digital Libraries in Computer Science: The MeDoc Approach
Author(s):
A. Barth
M. Breu
A. Endres
A. de Kemp
Publisher:
Springer
In:
Digital Libraries in Computer Science: The MeDoc Approach
Year:
1998

Classification(s):
J.1, H.2.6, I.7, C.2, I.4.1, E.4.5

BibTeX entry

Chapter(s):
II: Design Considerations of the MeDoc System
Page(s):
67--78
Year:
1998

Abstract:
One of the objectives of the Medoc system is transparent searching in heterogeneous distributed bibliographic and full text databases (information providers). For a sufficiently large number of information providers and automatic method for provider selection becomes necessary. We take a decision-theoretic approach: we estimate the cost for retrieving n relevant documents from each provider, then choose the combination which minimizes total costs. The main cost factor is the total number of relevant documents in each database; additional factors are the retrieval quality of the database, the costs for retrieving a document from the database, and the user-specific costs for retrieving a non-relevant or a relevant document, respectively. In this paper, we also describe a first implementation of this approach where each factor is made explicit so that the implementation can easily be adapted for specific situations.

BibTeX entry