US6078917 Патенты
A method of retrieving documents from a document data base is disclosed. A set of documents is retrieved according to a first Search Statement. A signature for a first retrieved document, and preferably other documents by Searching for words in the first document and removing common words which occur in a relatively high frequency in a natural language in which the first document is written. The docu ment for which the Signature was developed is displayed. Responsive to a user indication that a Second Search is to be made, deriving a Second Search Statement from the Signature
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