JK> I thought all xml had to be prefaced with another document...

 SL> No idea.. they usually have the xml version and sometimes a DTD or
 SL> other bits at the top before the main content, but I don't know if
 SL> it's necessary. 

It's optional.

We should, however, keep an accurate schema for thoose who whish to check
calidity against it ant to keep a structure for developers.

//Micke 
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