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Posted to commits@daffodil.apache.org by "Mike Beckerle (Jira)" <ji...@apache.org> on 2022/02/15 19:02:00 UTC

[jira] [Created] (DAFFODIL-2659) Special 6-bit character set needed

Mike Beckerle created DAFFODIL-2659:
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             Summary: Special 6-bit character set needed
                 Key: DAFFODIL-2659
                 URL: https://issues.apache.org/jira/browse/DAFFODIL-2659
             Project: Daffodil
          Issue Type: New Feature
          Components: Back End
    Affects Versions: 3.2.1
            Reporter: Mike Beckerle


This 6-bit charset encoding is needed. Suggested name ICAO-6-bit. 

The bit order is mostSignificantBitFirst. 

Each 6-bit group encoded:
 * 0 = no statement
 * 1..26 = “A”..”Z”
 * 27-31 = not used
 * 32 = “ “ (Space character)
 * 33-47 = not used
 * 48..57 = “0” (number)..”9”
 * 58-63 = not used

The above encoding is based on

International Civil Aviation Organization, Annex 10 – Aeronautical Telecommunications, Volume IV, Chapter 3, Table 3-7: Character coding for transmission of aircraft identification by data link.



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