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Robust modification of persistent objects while preserving formatting and other attributes

  • US 6,347,323 B1
  • Filed: 03/26/1999
  • Issued: 02/12/2002
  • Est. Priority Date: 03/26/1999
  • Status: Expired due to Term
First Claim
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1. A method for preserving attributes of a persistent object stream in a file that includes at least one object when the file is opened in a different environment than that in which the file was originally created, comprising the steps of:

  • (a) creating a copy of attributes associated with each object when opening the file in the different environment, said copy including attributes that are unknown to said different environment;

    (b) ignoring any of said attributes associated with each object that are unknown to the different environment; and

    (c) when writing the file, merging known attributes associated with each object that are changed in the different environment, with the copy of the attributes associated with the object, including any attributes that are unknown.

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