I don't think this is a disambiguation page, since "professional school" is not a word that could specifically refer to any of the schools listed, but rather a word that acts as a category that includes all of the words listed. This is also why I believe the article, at the moment, is a stub; much more could be said about the general concept of professional schools. --216.165.32.172 (talk) 07:41, 16 May 2008 (UTC)
I don't think there is a coherent link between professional schools like law school and vocational school. Because the term "professional school" is used so differently among different people, I think this should remain a disambiguation page because very little conceptually ties together all of the types of schools.
As far as I know, professional schools such as law school, business school, and medical school are all graduate programs. These are termed professional graduate programs (i.e., JD, MBA, MD) as opposed to academic graduate programs (i.e., MA, MS).
Yet, according to the current article, some people consider vocational school to be a professional school. As far as I can tell, the only thing in common between a graduate program (i.e., law school) and vocational school is that they are (a) both schools, and (b) probably require a high school diploma. What would this article consist of? It would probably always be a stub, or it would eventually be merged with tertiary education.