generally recommend the use of an explicit F[...] in order to
Link F[Date] V[myDate]
difference between these two is the following:
"Link" command triggers two actions, one before input
and one after.
input, V[myDate] is changed in the first case above. It gets the
value of the field F[Date].
In the second case above, the content of F[date] is changed; it
gets the value of V[myDate].
input, V[myDate] obtains the new value of F[Date] in both cases.