OASIS Mailing List ArchivesView the OASIS mailing list archive below
or browse/search using MarkMail.


Help: OASIS Mailing Lists Help | MarkMail Help



   Re: ASN.1

[ Lists Home | Date Index | Thread Index ]
  • From: David Brownell <david-b@pacbell.net>
  • To: reschke@medicaldataservice.de
  • Date: Thu, 15 Apr 1999 07:25:23 -0700

Julian Reschke wrote:
> > And fourth, DER and BER are examples of a philosophy of protocol
> > development that's been largely discredited for mainstream applications:
> > "bitstuffing". ...
> > Many folk think DER/BER should be the first to be
> > put against the wall when the revolution (XML?) comes; they're
> > that unpleasant to use.
> > ...
> I would be extremely careful with this. There will always be a reason to
> stick as much as data as possible into a your byte stream. Right now people
> pay a premium in both performance and price for IP over cell phones, 

That isn't "mainstream", either in quantity or bitrate (14.4Kb).

Consider, though:  the DER encoding of 32 bit numbers takes more than
32 bits.  One aspect of "bitstuffing" the DER/BER way is what one might
call "The Joy of BitFields" -- used all over the place to flag and tag
data.  In this case, bitstuffed != space-efficient.

Note that I wasn't advocating _wasting_ bandwidth.  There are systems
where bandwidth is a critical resource ... and it's never completely
free, so it shouldn't be wasted.  That's not the same as designing a
protocol down at the bit level.

- Dave

xml-dev: A list for W3C XML Developers. To post, mailto:xml-dev@ic.ac.uk
Archived as: http://www.lists.ic.ac.uk/hypermail/xml-dev/ and on CD-ROM/ISBN 981-02-3594-1
To (un)subscribe, mailto:majordomo@ic.ac.uk the following message;
(un)subscribe xml-dev
To subscribe to the digests, mailto:majordomo@ic.ac.uk the following message;
subscribe xml-dev-digest
List coordinator, Henry Rzepa (mailto:rzepa@ic.ac.uk)

  • References:
    • RE: ASN.1
      • From: "Julian Reschke" <reschke@medicaldataservice.de>


News | XML in Industry | Calendar | XML Registry
Marketplace | Resources | MyXML.org | Sponsors | Privacy Statement

Copyright 2001 XML.org. This site is hosted by OASIS