[xsl] XML to XML conversion

["Nick Roberts" <nick_roberts5@xxxxxxxxxxx>]

i'm aware that one of XML's key benefits is the ability to standardise a 
dataset, allowing compatibilty between incompatible systems and efficiency 
of data exchange.

In this case, am I correct in assuming that xml-to-xml conversion is 
neccessary?

I'm having difficulties finding any resources for this area. I understand 
XML and XSL concepts, but there seems to be a grey area over XML to XML 
conversion.

I'd be most grateful if anyone good point me in the directions of any 
articles or books that may be of use.

Thanks in advance,

nick