Binary Data in XML

[Jonathan A. Borden]

Yeah, but please include an

xml:content-type=

as a required attribute ... err or perhaps the default is 
xml:content-type="application/octet-stream"

another alternative to xml:packed might be
xml:content-encoding="base64" ??

Jonathan Borden
JABR Technology Corporation
mailto:jborden at mediaone.net

> 
> 
> Suppose I wrote up a NOTE, should occupy less than one page, proposing
> a reserved attribute xml:packed with, for the moment, only two
> allowed values, "none" and "base64".  The default value is "none".
> If an element has xml:packed="base64" this means that
> 
> (a) the content of the element to which this is attached must be
>     pure #PCDATA, no child elements and no references, and
> (b) the content is encoded in base64, leading and trailing spaces allowed
> 
> This obviously couldn't retroactively become part of XML 1.0, but
> if it went through a process and became a W3C recommendation, I bet
> every parser author in the world would support it in about 15 minutes.
> 
> Base64 (a 4-for-3 encoding) wastes 33%, so I thought about perhaps
> inventing Base128 (8-for-7) or maybe even a higher level to cut down
> wasteage, but Base64 has the advantage that it avoids UTF8/ISO-8859 
> confusion and I bet Mr. LZW will eat that 33% anyhow...
> 
> I also thought about xml:encoding=, but that conflicts with
> encoding= in the XML declaration in a confusing way.
> 
> Are there any gotchas I'm missing?  Don't know if I could persuade
> one of the WGs to take it up, but it seems pretty obvious that there
> is not only industry demand but in fact people doing this already, so
> the case is pretty strong I think. -Tim
> 
> 
> 

xml-dev: A list for W3C XML Developers. To post, mailto:xml-dev at ic.ac.uk
Archived as: http://www.lists.ic.ac.uk/hypermail/xml-dev/
To (un)subscribe, mailto:majordomo at ic.ac.uk the following message;
(un)subscribe xml-dev
To subscribe to the digests, mailto:majordomo at ic.ac.uk the following message;
subscribe xml-dev-digest
List coordinator, Henry Rzepa (mailto:rzepa at ic.ac.uk)