Richard Levitte - VMS Whacker wrote:
> If I understand everything correctly, the letters, digits and so on do
> not share the same numeric (character code) space in EBCDIC and in
> ASCII. With that in consideration, I can very well see problems if a
> file is written with ASCII encoding and later on read with the
> assumption that it was written with EBCDIC encoding. Base64 wouldn't
> help in this case, or?
The alphanumeric characters in ASCII and EBCDIC have the same
binary representation, as well as the other characters chosen
for Base64 representation.
Base64:
NOTE: This subset has the important property that it is
represented identically in all versions of ISO 646, including US
ASCII, and all characters in the subset are also represented
identically in all versions of EBCDIC. Other popular encodings,
such as the encoding used by the uuencode utility and the base85
encoding specified as part of Level 2 PostScript, do not share
these properties, and thus do not fulfill the portability
requirements a binary transport encoding for mail must meet.
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