Comment:

A clear definition with a single way to link the value set of the ansswers to a question is not findable (I couldn't find it). Examples show values sets sometimes embedded at the top, sometimes in line in the <group>, and all of the Linkid value point somewhere else - not in the same xml document or profile, and not anywhere on the FHIR site - including 404 errors on the URLs that are there. It appears that a given form must be built with numerous separate pieces, and no clear manifest or way to be sure one actually has them all in place. Valudaiton seems to be a major problem the way the recursive entities are linked and use the instances of Coding to declare the answer lists.