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RE: Binary XML

• From: Joshua Allen <joshuaa@m...>
• To: 'Mike Sharp' <msharp@l...>, xml-dev@x...
• Date: Tue, 26 Sep 2000 19:03:35 -0700

The format used for binary tokenisation in WAP is WBXML:
http://www.w3.org/TR/wbxml/

Dan Suciu and Hartmut Liefke built a compressor specifically for XML that
uses information about the tags to get better compression than normal
text-oriented compression (such as gzip)
http://www.research.att.com/sw/tools/xmill/

-J


> -----Original Message-----
> From: Mike Sharp [mailto:msharp@l...]
> Sent: Tuesday, September 26, 2000 3:40 PM
> To: xml-dev@x...
> Subject: Re: Binary XML
> 
> 
> 
> 
> A WAP gateway does a binary tokenizing compression bit on the 
> original WML, that
> results in astonishing compression.  Don't know how that 
> applies to your
> comments, but anecdotally, I've seen (and heard about) pretty 
> good compression
> simply by using HTTP 1.1 and turning compression on.  
> Obviously, this doesn't
> help if the XML transport isn't over HTTP (semaphore, anyone?).
> 
> I'd be curious what people think about it--without, as you 
> say,  involving the
> wire protocol.  Is it really necessary to map a specific 
> token to a specific
> element (for example)?  I suppose that it would allow a user 
> to de-tokenize the
> document, returning it to some semblance of readability.  But 
> this could be done
> in a particular implementation, if needed, by referencing 
> some external document
> map, couldn't it?
> 
> Of course, the tokenized XML gets tricky if there are 
> external schemas, DTD's or
> other XML,..how do you map the elements in the schema to the 
> same elements in
> the XML, after they've been tokenized?  Or did I miss the point...?
> 
> Curiously,
> Mike Sharp
> 
> 
> 
> 
> 
> 
> 
> 
> "Bullard, Claude L (Len)" <clbullar@i...> on 09/26/2000 
> 01:01:00 PM
> 
> To:   xml-dev@x...
> cc:    (bcc: Mike Sharp/Lante)
> 
> Subject:  Binary XML
> 
> 
> 
> Raising an old horse, possibly dead:
> 
> Has a standard XML binary token set,
> possibly based on the InfoSet to
> enable application to different
> XML vocabularies been created?
> 
> Or is the thinking still that
> this side of the wireless protocols,
> zipping/unzipping is still sufficient
> given modem support?
> 
> Len Bullard
> Intergraph Public Safety
> clbullar@i...
> http://www.mp3.com/LenBullard
> 
> Ekam sat.h, Vipraah bahudhaa vadanti.
> Daamyata. Datta. Dayadhvam.h
> 
> 
> 
> 
> 

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