That transformation doesn't appear to work. Maybe I am implementing it wrong - but it also seems that that transformation is designed to retain HTML characters that already exist but not convert text characters to HTML (or hex).
a) Strip out special characters (since the value I want to pass to the Query String is from a text field in Kentico the user can enter all sorts of special characters... like &, ', !, -, etc) as the value is placed by the transformation on the page...
b) Convert special characters to HEX when pulling the value from the database.
Please let me know - if you have any suggestions.