QTR-Quadtone RIP

I'm looking at various curves and noticed that the K7-1440-HanPhotoRag
with the Quad2200-NK7 uses all the inks and the linearization values
run from the highest to the lowest.  All the other ink curves run from
the lowest to the highest and use only some of the inks.  I thought
the values must run from lowest to highest.  Also all the NK7 ink
descriptor file aren't available.  Is this a piezography proprietary
thing?

Tom