Raul has provided good clues. Before I read his
reply I looked automatically at
www.jsoftware.com/help/dictionary/dictf.htm (which was found
fifth when I employed Raul's search) and saw the following
figure which I have enhanced slightly in a way that I think
should have been done on the existing dictionary page
because the symbols f,g,h, and cap are not explicitly given
there (Roger, do you agree? The longest line below is the
one that I added.)

         HOOK                FORK             CAPPED FORK
   (g h)y   x(g h)y    (f g h)y x(f g h)y ([: g h)y x([: g h)y
      g       g           g        g            g     g
     / \     / \         / \      / \           |     |
    y   h   x   h       f   h    f   h          h     h
        |       |       |   |   / \ / \         |    / \
        y       y       y   y   x y x y         y   x   y

        Tracy, the comments just below the above graphic on
this Dictionary page gives the special conditions when a
fork treats a noun as if it were a verb in a fork.

        Changing the subject slightly, and addressing mostly
seasoned J users, another observation I made while viewing
this Dictionary page is that only the verb trains, not the
adverb or conjunction-noun or conjunction-verb trains,
require "An isolated sequence" to be recognized by the J
parser. That seems to be a distinction that I have not
previously noticed, but employed often. Perhaps that subtle
non-requirement would be a good addition to this Dictionary
page.

On Thu, 17 May 2007, Raul Miller wrote:

+
+ I believe most of the pages listed at
+    http://www.google.com/search?q=site:jsoftware.com+noun%20fork
+ would be appropriate
+

(B=)
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