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Document search and retrieval system with partial match searching of user-drawn annotations

  • US 5,832,474 A
  • Filed: 02/26/1996
  • Issued: 11/03/1998
  • Est. Priority Date: 02/26/1996
  • Status: Expired due to Fees
First Claim
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1. A document search and retrieval system comprising:

  • a memory having a first data structure for storing document data and a second data structure for storing annotation data;

    a user interface having drawing tool for user input of stroke data corresponding to a user-drawn symbol, said stroke data having spatial and temporal components;

    said user interface communicating with said second data structure to store said spatial and temporal components of said stroke data in association with a user-selected portion of said document data;

    a search engine communicating with said user interface for receiving a user-drawn search symbol comprising said stroke data;

    said search engine communicating with said second data structure for matching patterns in the spatial and temporal components of a user-drawn search symbol with patterns in the spatial and temporal components of stroke data stored in said second data structure to locate a potential match for the user-drawn input search symbol;

    said search engine accessing said first data structure to select a portion of said document data corresponding to the match hypothesis and thereby retrieve a portion of said document data that has an associated user-drawn symbol that substantially corresponds to said search symbol.

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