Preventing Record lock for Subfile being loaded

I was looking at an RPG/400 example for a subfile program which UPDATES a
file. In the example, an "N" was placed in the H/P/N column to indicate that
the Read statement not lock the record while the subfile was being loaded
for display. I realize that there is no reason to lock the file until the
update is going to be performed. However, I have also looked at RPGIV
examples in which this was not indicated.

Is this common practice while loading subfiles before the update is
executed?

What is the RPGIV equivalent of this example?


Thanks,
Bill Graziano
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