How hard would it be to do an XSL interpreter/explorer?

Hi all,

I was wondering how hard it would be to wrap up
one of the current XSL tools to make an XSLT
"interpreter".

I was thinking of something along the lines of 
an interactive database query explorer, but where 
you can enter XPath and XSLT expressions. The 
results could be shown as XML text fragments, 
or even graphically.

Am I barking up the wrong tree with this?


 XSL-List info and archive:  http://www.mulberrytech.com/xsl/xsl-list