[Standards] the meaning of "MUST be empty"

Guus der Kinderen guus.der.kinderen at gmail.com
Tue Jun 19 11:32:14 UTC 2018


I don't remember ever making use of a. I'd expect implementations to
generate b, but accept c.

On Tue, 19 Jun 2018, 13:11 Bartłomiej Górny, <
bartlomiej.gorny at erlang-solutions.com> wrote:

> Hi
>
> If a XEP states that an attribute "MUST be empty", does it mean that it:
> a) must be present and have a value ""
> b) must not be there
> c) can be either of the two
>
> The question arose because of XEP-0313, which in point 5.1.2 says:
>
>      "When sending out the archives to a requesting client,
>      the 'to' of the forwarded stanza MUST be empty"
>
> and then gives an example where forwarded stanzas have no 'to'
> attribute. We just hit a situation where there are conflicting
> implementations, and we want to sort it out The Right Way, hence the
> question.
>
> BG
>
> --
> Leże, oglądam mecz, pije piwo, zagryzam czipsem i jeszcze głaszcze psa.
> Nagle wchodzi żona i awanturuje się, że nic nie robie.
>
> (piniol, bash.org.pl)
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