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Method and system for providing data compatibility between different versions of a software program

  • US 5,740,405 A
  • Filed: 12/17/1992
  • Issued: 04/14/1998
  • Est. Priority Date: 12/17/1992
  • Status: Expired due to Term
First Claim
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1. A method executed in a computer system for providing compatibility between a prior version of a computer program and a later version of the computer program, the computer including a memory storing a file with data in both a version dependent external format specific to the prior version of the computer program and data in a version independent data format, the method comprising the steps of:

  • receiving a request to process the data stored in the file using the later version of the computer program;

    determining whether the data stored in the version dependent external format can be processed by the later version of the computer;

    when the data can be processed by the later version of the computer program, loading the data into memory;

    when the data cannot be processed by the later version of the computer program, retrieving the data in the version independent data format, converting the retrieved data to a version dependent internal format that can be processed by the later version of the computer program, and loading the converted data into memory; and

    processing the loaded data using the later version of the computer program.

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