how to implement different xsl in one document

hi,
I have the following problem: I have three different xml/xsl files, one for
menu above, one for navigation, one for holder. Now I'd like to put
everything together in one file. Can I make it with the help of
'xsl:include'? If yes, how? Can I connect three different xsl in one file?

thanks

> INTERSHOP. Creating the Digital Economy 
> Elena Vorster, 
> R&D 
> INTERSHOP Communications GmbH, Leutragraben 2 - 4, 07743 Jena, GERMANY 
> Tel +49-3641-894378, Fax +49-3641-894399, <http://www.intershop.de/> 
> 
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