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System and method for filtering a document stream

  • US 6,105,023 A
  • Filed: 08/18/1997
  • Issued: 08/15/2000
  • Est. Priority Date: 08/18/1997
  • Status: Expired due to Term
First Claim
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1. An apparatus for filtering documents as received, the apparatus comprising:

  • a document parser, said document parser accepting a document as input as it is received and providing an inverted list of terms contained in the document as output;

    a profile parser, the profile parser accepting a user query comprised of terms and operators as input and providing a query net representing a parsed user query as output; and

    a comparator that compares the inverted list for an incoming document against the query net representing the parsed query and providing as output an indication whether the incoming document matches the parsed query,wherein,the apparatus is programmed to filter documents using recursive statistical inference in which numerical weights assigned respectively to the query terms are combined as dictated by the query operators and in which evaluation of one level of a query tree pauses while evaluation of another lower level proceeds.

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