RE: What does "optional" mean?
> I would agree with David Carlisle. > In schema, "optional" doesn't mean ANY of the items you suggest. Yes, I stand corrected. Despite my best efforts, how quickly and easily I fall into the trap of ascribing meaning to constructs in schemas. Let me rephrase my question: Why make one element mandatory and another optional? That is, what is it about some information that it is declared mandatory whereas another information is declared optional? /Roger
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