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Method and system for creating natural language understanding grammars

  • US 8,260,619 B1
  • Filed: 03/30/2009
  • Issued: 09/04/2012
  • Est. Priority Date: 08/22/2008
  • Status: Active Grant
First Claim
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1. A system comprising:

  • a) an input connection, wherein said input connection is operable to receive a natural language input from a user;

    b) a computer readable medium, said computer readable medium having stored thereon a plurality of grammars, wherein said plurality of grammars is organized according to a hierarchy comprising five levels, wherein;

    i) a grammar from the lowest of the five levels comprises a vocabulary comprising words corresponding to natural language statements; and

    ii) for each level above the lowest level in the hierarchy, each grammar from that level comprises one or more elements provided by a grammar from the next lower level in the hierarchy;

    c) a computer, said computer configured with a set of computer executable instructions operable to, during an interaction with the user, cause the computer to perform a set of acts comprising;

    i) based on the natural language input from the user, determine a goal for the user;

    ii) determine a set of information necessary for the user to provide for the goal to be completed, wherein determining the set of information is performed using a first grammar from said plurality of grammars;

    iii) determine a set of missing information from the set of information, wherein the set of missing information comprises information which has not been provided by the user during the interaction;

    iv) based on a second grammar from the plurality of grammars, determine a prompt to provide to said user to obtain one or more elements from said set of missing information; and

    v) provide said prompt to said user.

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