[basex-talk] Counting

Hi, I have a structure like this: <c> <a>red</a> <a>red</a> <a>blue</a> <a>green</a> <a>green</a> </c> And I would like to get: <c> <a n="1">red</a> <a n="2">red</a> <a n="1">blue</a> <a n="1">green</a> <a n="2">green</a> </c> I have tried with two for loops after having identified the distinct-values(). This is in principle correct but it takes too long (I have many distinct values and a elements), because I cannot exit the for loop as soon as I get a match. I have been able to get the result with the window clause and then counting the elements of the window with a nested for-loop: is there an alternative solution? Thanks. Joseph