decoding hex string to ascii or UTF-8

I'm currently trying to work out the best way to convert a string of hex into
the characters represented by each hex byte. I'm using xslt 2.0. So far I've
come up with a function that simply does a lookup to from the hex value to the
ascii character that hex value represents (see below). Can anyone suggest a
better way? Is there a way (without using a huge lookup to achieve a similar
sort of  thing for UTF-8 chars?




















        !
        "
        #
        $
        %
        &
        '
        (
        )
        *
        +
        ,
        -
        .
        /
        0
        1
etc.


Regards

Steven Hentschel
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