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1.6 Versioning and Localization

This document covers versioning issues in the following areas:

  • Structure Versions: There are two versions of the compound file structure, version 3 and version 4. These versions are defined in section 2.2. In a version 4 compound file, all features of version 3 MUST be implemented.

    Implementations MUST return an error when encountering a higher version than supported. For example, if only version 3 compound file is supported, the implementation MUST return an error if a version 4 compound file is being opened.

  • Localization: There is no localization-dependent structure content in the compound file structure. In the implementation, all Unicode character comparisons MUST be locale-invariant and all timestamps MUST be stored in UTC time-zone.

 
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