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Information retrieval

  • US 20070185831A1
  • Filed: 03/09/2005
  • Published: 08/09/2007
  • Est. Priority Date: 03/31/2004
  • Status: Abandoned Application
First Claim
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1. A method of operating an information retrieval system for retrieving information from a database in response to queries submitted by a user, said method comprising the steps of:

  • receiving a first user query;

    deriving a first lexical chain set from said first user query using a predetermined lexical chaining algorithm, said first lexical chain set comprising one or more lexical chains representing possible interpretations of said first user query;

    storing one or more lexical chains from said first lexical chain set in a lexical chain storage means;

    identifying a first subset of documents from said database using said first lexical chain set and a predetermined information retrieval algorithm;

    making information relating to said first subset of documents available to the user;

    receiving a subsequent user query, said subsequent user query being related to said first user query;

    deriving a subsequent lexical chain set from said subsequent user query using a predetermined lexical chaining algorithm in conjunction with one or more lexical chains stored in said lexical chain storage means;

    identifying a subsequent subset of documents from said database using said subsequent lexical chain set and a predetermined information retrieval algorithm;

    making information relating to said subsequent subset of documents available to the user.

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