Azonic3d:
Ordinate dims in the sketcher are a mixed blessing, IMHO. I used them in Pro/E for a while, but confusion would often ensue when transferrign the dimensions to the drawing. If you 'showed' the ordinate dims from multiple sketches in a drawing view, there would be multiple '000' dims that had to be aligned. You could end up with dozens of them all overlapping and no good way to ascertain which 000 was associated with which feature.
I eventually abandoned the practice and haven't really missed it.
Ed