[vorbis-dev] Metadata Schema

[Beni Cherniavsky]

On Thu, 31 May 2001, rillian wrote:

> On Thursday, May 31, 2001, at 08:37 , Jon Doda wrote:
> 
> > There's been talk off and on about an xml metadata format, but 
> > nothing's ever really been done.  In the intrest of giving it a kick in 
> > the pants I've decided to sit down and write a preliminary Schema for 
> > it.  I've got a few other things to get of my plate first, so I can't 
> > start on it right away, but I did want to begin collecting information 
> > on what people want to see in the format.  If you've got any great 
> > ideas or burning desires for what you'd like to see in the format than 
> > please share them.
> 
> [snip]
>
> Note that the type detection is a bit trickier if you're going to use 
> xml. My general thought was to do magic detection on the initial 
> '<?xml', since that's the only part guaranteed to be at a given offset. 
> Pass that to a general xml 'codec' that can read the 
> doctype/dtd/schema/top-level tag and decide if/how to really parse it.
> 
> Likewise with packetization, since xml isn't designed to do that.
> 
> I've been assured that one can write a small, limited parser for a 
> specific schema very easily, but others have said, no, at least not 
> while still allowing the full xml spec. Is that somthing you can comment 
> on? I don't really know the spec well enough to have a separate opinion, 
> but codesize is a big issue for a lot of player implementations.
> 
I don't know xml enough to answer but if the answer is negative, the LISP
/ Scheme syntax is really simple to parse while having the same power
(it's the same idea of fully-parantetized notation :).  It also scares
many people - is that a good feature?  I've seen it used in several
programs and games to store data although the programs didn't use LISP
internally.


-- 
Beni Cherniavsky <cben at crosswinds.net>
                 (also scben at t2,cben at tx in Technion)

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