XSL stylesheets !

Hi everybody,

I have just started working on XML and XSL stuff and i read the official
documentation on internet about XSL and i think that is not really simple to
understand but ,using some examples, i was able to create something.
Anyway, i have to apply the XML and XSL to work on WAP applications so i
have to work with the WML and i found some examples on internet about this
issue.
The only thing i don't understand is the kind of stylesheet i have use when
i write XSL.
I mean, is there any reference about the styleheet to use ? 
For instance, i noticed that when i have to convert a XML document in a HTML
one i have to use the following xsl stylesheet: 

<xsl:stylesheet xmlns:xsl="http://www.w3.org/XSL/Transform/1.0">

Could clear my mind before i get confused ?
Cheers.

                                Stefano


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