[metapost] put strings on state transition lines of MetaUML' state diagram

[Steven Woody]

in metauml's manul, it does not illustrate how to put usually needed
information on lines of a state diagram, these include:  the
conditions ( when the state trasition happened ), the behavior ( what
to do in the time of transition ).

so, the question is: how to draw these informations in metauml?  i see
the item( iAssoc ) in class diagram is close to my needs, so i guess
there is something similar dedicated to state diagram.  can you help?
thanks.

-- 
woody

then sun rose thinly from the sea and the old man could see the other
boats, low on the water and well in toward the shore, spread out
across the current.