[SPAM] RE: [dfdl-wg] BSDF

[mike.beckerle at ascentialsoftware.com]

Good find Jim,
 
One thing we can look at from these guys is their handling of bit-packed
fields. I've kind of been hand-waving the whole bit-level thing recently as
less important than "hard issues" of compositionality and layering, but we
do have to face this issue eventually.
 
Other than that, from my skim I don't see how we don't end up just subsuming
what they do. I expect there's quite a few efforts out there to add some
sort of dense-packed format description capability to XML. Until DFDL really
"comes out" I think we'll see more and more of this. In some sense this
bodes well for the eventual success of DFDL. 
 
In every case I suggest we reach out to them to be sure they are aware of
the DFDL effort, and then they can decide to contribute or not, but at least
they won't be working in a vaccum. At some point we'll badly need poeple to
review specs and consider if DFDL meets their needs.
 
...mikeb


  _____  

From: Myers, James D [mailto:jim.myers at pnl.gov] 
Sent: Tuesday, November 23, 2004 10:39 AM
To: dfdl-wg at gridforum.org
Subject: [SPAM] RE: [dfdl-wg] BSDF


I ran across another community working in the same space as DFDL: BSDL as
part of MPEG21 (someone at the NARA conference mentioned it). From a quick
look at what they have, it appears to be inverse DFDL with plans to make
DFDL next, i.e. they go from model to output binary format, but not vice
versa. Similar schema approach, etc. with some comments on things in schema
that they don't allow. I haven't found a spec doc yet, just a paper and some
presentations you can google for.
 
 Jim
 
 <http://www2002.org/CDROM/alternate/334/> Bitstream Syntax Description
Language: Application of XML-Schema ... 
... Language (BSDL) that embraces such XML bitstream descriptions. ... 2/;
[13] IEEE Standard for Binary Floating-Point ... Final Draft Amendment 4:
Streaming video profile ... 
www2002.org/CDROM/alternate/334/ 	
 

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