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Methods of inferring user preferences using ontologies

  • US 7,873,616 B2
  • Filed: 07/09/2007
  • Issued: 01/18/2011
  • Est. Priority Date: 07/07/2006
  • Status: Active Grant
First Claim
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1. A computer-readable medium having stored thereon a set of instructions which when executed perform a method for recommending an item to a user, the method, comprising:

  • defining an ontology as nodes in a graph, the nodes including a scored node and an unscored node, the nodes in the graph representing concepts;

    wherein, the scored node has an associated score based on a preference of the user for a concept represented by the scored node;

    using a propagating function and the associated score of the scored node, to determine, for the user, a personalized score of the unscored node in the ontology;

    wherein, the propagation function determines the personalized score of the unscored node based on a relationship of the unscored node and the scored node in the graph representing the ontology;

    identifying, for the user, a qualifying concept from the concepts in the ontology for which the personalized scores have been computed,wherein, the qualifying concept that is identified from the concepts, is one that is associated a qualifying score among the personalized scores that have been computed for the concepts at the nodes of the ontology; and

    selecting the item which is an instance of the qualifying concept to be recommended to the user.

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