I am trying to understand how you traverse through a random message in a
terser. I guess I would look in the MSH to determine what Message type it is.
But after that how do I actually iterate the message. How do you tell how many
repetitions are present of a group or field? How do you tell if an optional
group is present or not?
The only way I can think is just by testing for it and catching exceptions, but
that is pretty ugly. Essentially I am looking for a method like:
public boolean isPresent(String spec)
Does something like that exist?
thanks
-Ryan
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