Re: [xmpp] Fwd: Use of namespace in RFC 3920

[Dave Cridland <dave at cridland.net>]

On Thu Sep 24 09:38:25 2009, Remko Tronçon wrote:
> > That's indeed what I am doing. Right now XMPP is not really  
> following
> > XML rules. It made new ones, and make it more difficult.
>
> As far as i remember, XMPP is following XML rules, but only made  
> them
> stricter, such that the parsers were simpler (i.e. didn't have to  
> deal
> with full XML spec). This implies that the serializers have to play  
> by
> some rules (which isn't so bad, since serializing doesn't  
> necessarily
> need an XML library).
>
> I don't really see why you would need to modify your XML parser to
> handle XMPP if it can handle XML, but maybe I'm missing something.

You need to find out what the default namespace is bound to.

You can do this by concatenating a dummy element early on, if needs  
be - so you insert a "<tracer/>", then look to see what namespace it  
ended up with.

The serializer need to be able to explicitly set the default  
namespace, instead of shoving everything under ugly machine generated  
namespace prefices.

But this assumes that your XML library doesn't simply allow you to  
lookup, and set, the default namespace prefix anyway - I can't really  
believe that this would be unusual, given that it's useful for  
producing compact serialized output in many cases.

Dave.
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