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Re: When maxOccurs=1 means an unbounded number of occurrences

  • From: "C. M. Sperberg-McQueen" <cmsmcq@blackmesatech.com>
  • To: yamahito <yamahito@gmail.com>
  • Date: Tue, 21 Nov 2017 11:27:35 -0700

Re:  When maxOccurs=1 means an unbounded number of occurrences
> On Nov 20, 2017, at 4:13 PM, yamahito <yamahito@gmail.com> wrote:
> Hi Roger,
> I would disagree only with your initial interpretation: I think minOccurs=1 - I think 'exactly' trumps 'MAY'.
> Interested to see if the list thinks differently!

In ABNF, for any expression E the form *1E is short for 0*1E and means 
zero occurrences or one occurrence of E.

[1] https://tools.ietf.org/html/rfc5234#section-3.6 

In this case I think the MAY is reflecting the default value of 0 for the 
left-hand argument of *.

C. M. Sperberg-McQueen
Black Mesa Technologies LLC

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