maybe I missed the whole point of this string but I use Krause as my catalog for foreign coins. They don't list in most instances anything but your standard G, F VF, XF UNC BU and Proof. And they attempt to define these grades in the intro to the catalog by describing some grading criteria.
I'm interested in the Euro-standard concept though. Where Krause says greater than 75% of detail is XF, what would the Euro-standard say about that as a grading criteria?