Distinct_values in tags is not working as needed

 Hi All,

On the PO document, we are printing the taxes per PO line however we need to print each different tax once ( as some PO lines have multiple distributions lines and we don't want to print the same tax many times). I have tried the following in the template but i am getting weird results. so my question is : do i use the distinct_values functionality right?! or i have to use something else?

here is what i have tried:

<?for-each:xdoxslt:distinct_values(DISTRIBUTIONS_ROW)?>

<?TAX?>

<?end for-each?>

Thank you for your help

Husam