wclodius @los-alamos.net:

"FWIW I think of Asperger's as a form of autism, one of
two or three forms of high functioning autism. I would not
say that the only commonality is the diagnosis.

The commonality is the set of symptoms that should lead
to a diagnosis. The diagnosis implies problems in
communication, particularly problems in communicating
emotion, which can be addressed by a variety of (often
related) techniques.

However the dividing line between autism, other forms of
pervasive developmental disorder, and schizophrenia is
arbitrary and beyond that a child can not be summarizeed
by a single diagnosis, or set of symptoms.

FWIW I believe I have Asperger's, but that diagnosis only
became common in the 90s, several decades after the time
in life when that diagnosis might have been very useful to me."