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- Newsgroups: comp.mail.mime
- Path: sparky!uunet!elroy.jpl.nasa.gov!usc!cs.utexas.edu!torn!utzoo!henry
- From: henry@zoo.toronto.edu (Henry Spencer)
- Subject: Re: X.400 and multimedia mail
- Message-ID: <Bz6H65.EnH@zoo.toronto.edu>
- Date: Sun, 13 Dec 1992 03:18:04 GMT
- References: <1g5cpdINNob@nigel.msen.com> <1992Dec10.101834.15981@ericsson.se> <davecb.724004446@yorku.ca> <1992Dec11.153138.2198@ericsson.se> <1galsqINNr88@gap.caltech.edu>
- Organization: U of Toronto Zoology
- Lines: 26
-
- In article <1galsqINNr88@gap.caltech.edu> jack@ccsf.caltech.edu (Jack Stewart) writes:
- >As I understand, the main reason for MIME to use base64 encoding (as
- >opposed to uuencode, 8bit transparent, XDR, or BER ) was that they
- >needed an encoded scheme that would remain uncorrupted accross all
- >platforms and architectures and existing mailers. Apparently this is
- >a real problem with IBM VM/CMS machines. base64 encoding was the only
- >thing that would survive these machines. Hopefully these machines
- >will go away some day and then we can use a more reasonable encoding
- >mechanism.
-
- What would be "more reasonable"? I can well believe that CMS was the
- worst case, but if you want to transmit arbitrary bits, there are lots
- of other systems with limitations that make an encoding necessary.
- (For example, most sendmail implementations croak on 8-bit characters
- in headers, I'm told.)
-
- Also, can you explain your list of "as opposed to" encodings? It seems
- to mix several different issues. XDR and BER are ways of encoding higher-
- level data structures as a bit stream, not ways of getting arbitrary bits
- through limited channels. 8-bit transparent isn't an encoding, it's the
- *absence* of an encoding. And uuencode is essentially identical to
- base64 except that it's not as good, due to some fundamental design
- mistakes; in particular, it isn't any more compact.
- --
- "God willing... we shall return." | Henry Spencer @ U of Toronto Zoology
- -Gene Cernan, the Moon, Dec 1972 | henry@zoo.toronto.edu utzoo!henry
-