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Dynamic Concept Based Query Expansion

  • US 20150379010A1
  • Filed: 06/25/2014
  • Published: 12/31/2015
  • Est. Priority Date: 06/25/2014
  • Status: Abandoned Application
First Claim
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1. A method, in an information handling system comprising a processor and a memory to expand queries processed by a question/answer (QA) system, the method comprising:

  • extracting, by at least one of the processors, a plurality of concepts from a plurality of documents, wherein the extracting includes utilizing natural language processing (NLP) to identify the concepts included in natural language passages found in the documents, and wherein the concepts are stored in the memory;

    generating, by at least one of the processors, a plurality of child level categories in a category hierarchy from the plurality of concepts, and storing the generated child level categories in the memory;

    grouping, by at least one of the processors, the child level categories into a plurality of sets based on a related concept identified for each of the child level categories included in each of the sets;

    creating, by at least one of the processors, a plurality of parent categories, wherein each of the parent categories corresponds to a plurality of child level categories included in one of the plurality of sets, and storing the parent categories in the memory;

    dividing a corpus utilized by the QA system into a plurality of sub-corpora, wherein each of the sub-corpora corresponds to one of the child level categories, wherein each of the sub-corpora is stored in the memory; and

    answering, by at least one of the processors, a question posed to the QA system by identifying one of the child level categories related to the question and searching the sub-corpora corresponding to the identified child level category.

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