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System and method for managing document retention of shared documents

  • US 7,171,620 B2
  • Filed: 07/24/2002
  • Issued: 01/30/2007
  • Est. Priority Date: 07/24/2002
  • Status: Expired due to Fees
First Claim
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1. A method for managing retention of a document submitted to a recommender system, comprising:

  • analyzing a document'"'"'s substance to compute a lifetime of the document;

    defining a visibility value that estimates the document'"'"'s importance to the users of the recommender system;

    determining over a time interval;

    (a) whether higher quality siblings of the document exist in the recommender system, and (b) whether a user action or an event has occurred;

    adjusting the visibility value of the document in the recommender system as a function of;

    (a) the user action when the user action occurs over the time interval, and (b) the document'"'"'s substance when an event occurs over the time interval;

    decreasing the visibility value of the document in the recommender system as a function of the document'"'"'s substance when no user action or event occurs over the time interval, the visibility value thereby decreasing continuously over the time interval within the computed lifetime; and

    removing the document from the recommender system when;

    (a) higher quality siblings of the document exist in the recommender system, or (b) the visibility value of the document in the recommender system is less than a threshold value.

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