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Article #14

Re: X.400 and multimedia mail

#14
From: Alasdair Grant
Date: Fri, 11 Dec 1992 20:19
19 lines
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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.

Yes, but this is a minor problem compared to the presence of machines
which use the 7-bit American ASCII code, where the top bit is a parity
bit.  EBCDIC, as used by VM/CMS (and MVS and DOS), is an 8-bit code.
Neither uuencode nor base64 are 'reasonable', since they both 'waste'
bandwidth, but the reason they exist is fundamentally because ASCII
is a 7-bit code.

By the way, there are lots of other machines which have even _fewer_
printable characters than VM/CMS.
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Message-ID: <1992Dec11.201947.17868@infodev.cam.ac.uk>
Path: arc1-ca.pugleaf.net!sparky!uunet!pipex!pavo.csi.cam.ac.uk!ag129
References: <davecb.724004446@yorku.ca> <1992Dec11.153138.2198@ericsson.se> <1galsqINNr88@gap.caltech.edu>

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Path: arc1-ca.pugleaf.net!sparky!uunet!pipex!pavo.csi.cam.ac.uk!ag129
From: ag129@cus.cam.ac.uk (Alasdair Grant)
Subject: Re: X.400 and multimedia mail
Message-ID: <1992Dec11.201947.17868@infodev.cam.ac.uk>
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References: <davecb.724004446@yorku.ca> <1992Dec11.153138.2198@ericsson.se> <1galsqINNr88@gap.caltech.edu>
Date: Fri, 11 Dec 1992 20:19:47 GMT
Lines: 19