kia ora marty e hoa ma
in reply to your title and to fulfill my skills requirement - have you read linda thede's book "computers in nursing" chapter 18 on infomatics?
it is very short (5 pages) and defines nursing infomatics as 'managing information related to nursing' (american nurses association, 1994).
apparently 'nursing informatics specialists create databases to support nusing or help nursing managers develop systems to improve patient care' (thede, 1999, p 289).
i hope this helps, i tried to get this on the board earlier but the system was down.