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Message filtering

  • US 8,122,027 B2
  • Filed: 12/10/2002
  • Issued: 02/21/2012
  • Est. Priority Date: 12/20/2001
  • Status: Expired due to Fees
First Claim
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1. A computer-implemented method comprising:

  • receiving, at a document broker, a plurality of documents;

    creating a main topic tree of filtering elements in the document broker;

    parsing out a sub-tree from the main topic tree, wherein the sub-tree describes an authorization filter for a document supplied to the document broker and requested by a subscriber, and wherein the sub-tree is in an optimized format that is executable for filtering access to the document for the subscriber;

    storing the sub-tree with the document broker under an alias name as an alias-named filter, wherein the alias-named filter is automatically permanently stored with the document broker after the subscriber causes a temporary storing of the sub-tree as the alias-named filter a pre-determined number of times; and

    in response to a request from the subscriber for the alias-named filter, supplying the alias-named filter to the document broker to determine if the document is authorized to be supplied to the subscriber.

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