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RE: Re: ASN.1 is an XML Schema Language (Fix those lists!)and

• To: 'Pete Kirkham' <pete.kirkham@b...>, xml-dev@l...
• Subject: RE: Re: ASN.1 is an XML Schema Language (Fix those lists!)and Binary XML not needed
• From: "Bullard, Claude L (Len)" <clbullar@i...>
• Date: Thu, 6 Nov 2003 08:34:30 -0600

Huh?  Plug in decoders for binaries that they don't recognize or 
that they don't have in a library?  I can't speak for the X3D WG 
although I serve on the Web3DC BoD, but I don't think any decisions 
have been made although the RFP text does want a single binary. 
A pluggable decoder is fine and probably desirable by some.  Just 
let me be clear that no decisions are made at this time and bidders 
are stepping up.  Note the IPR policies are royalty-free.

len


From: Pete Kirkham [mailto:pete.kirkham@b...]

Conversely to Len's example of X3D, streaming media players support
mechanisms to 
plug in decoders for formats they don't recognise. 

If the encoding was expressed in suitable form, then that could be retrieved
and 
compiled instead having a library of native decoders. Such a mechanism would
also 
allow any XML encoding of the same data, and shift the encoding of data as 
attribute or element into the encoding rules rather than using [ATTRIBUTE]
or list 
inline - in effect making ENCODING-CONTROL XER pluggable but with alias,
ordering 
and graph serialisation controls. Kind of like architectural forms but with
ASN.1's 
binary formats (and possibly other text formats) thrown in free. 

Since one of the projects I work on has to support legacy text files, random

formats from other tools, its own XMI data and SOAP messages (which are
essentially 
aliases of each other), I can think of one use case for plugging encodings
like 
this; but at the moment someone ends up writing the encoder manually, rather
it 
being generated off a concrete syntax description.

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