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corresponding to the maximum value of the matching function achieved within a filial set
...1 we assume that effective retrieval can be achieved by finding just one cluster;2 we assume that each cluster can be adequately represented by a cluster represent ative for the purpose of locating the cluster containing the relevant documents;3 if the maximum of the matching function is not unique some special action,such as a look ahead,will need to be taken;4 the search always terminates and will retrieve at least one document
...An immediate generalisation of this search is to allow the search to proceed down more than one branch of the tree so as to allow retrieval of more than one cluster
...The above strategies may be described as top down searches
...If we now abandon the idea of having a multi level clustering and accept a single level clustering,we end up with the approach to document clustering which Salton and his co workers have worked on extensively
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