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Character string retrieval system having a variable display range

  • US 5,940,842 A
  • Filed: 07/31/1995
  • Issued: 08/17/1999
  • Est. Priority Date: 12/02/1994
  • Status: Expired due to Fees
First Claim
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1. A character string retrieval system for displaying a result of a search operation for a character string performed on a structured document, the system comprising:

  • character string searching means for performing a character string search on a structured document;

    structure analyzing means for analyzing a structure of the entire structured document;

    a coincidence position table for storing a located character string position, representing a position of the character string in the structured document, identified based on the character string search performed by said character string searching means;

    a structure unit position table for storing structure unit positions, identified based on the analysis performed by said structure analyzing means, said structure unit positions representing start and end positions of individual structure units constituting the structured document;

    text retrieving means for obtaining structure unit positions relevant to the character string using the structure unit position table and the coincidence position table, and for retrieving text corresponding to the obtained structure unit from the structured document; and

    commanding means for specifying a hierarchical level of the structure units referred by said text retrieving means when obtaining the structure unit positions,wherein when a full text search is performed on a plurality of structured documents, the text retrieving means displays a list indicating names of documents containing located character strings, along with the structure units of text containing the located character strings.

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