* Frank Ellermann wrote: >Bjoern Hoehrmann wrote: > >> You are turning "Messages may X iff Y" into "Messages must not X unless Y" > >You've lost me here, isn't that logically equivalent ? If it is equivalent >Julian's version is clearer. If it is not I likely miss the point. Julian's version allows using the same name more than once through a double negative under the assumption that MAY is the antonym of MUST NOT. I would not make this assumption, and I think double negatives are generally more difficult to understand than positive statements. If you want clearer text you would have to split the statements up and say: list-valued headers may occur more than once, other headers must not occur more than once. -- Björn Höhrmann · mailto:bjoern@hoehrmann.de · http://bjoern.hoehrmann.de Weinh. Str. 22 · Telefon: +49(0)621/4309674 · http://www.bjoernsworld.de 68309 Mannheim · PGP Pub. KeyID: 0xA4357E78 · http://www.websitedev.de/Received on Tuesday, 20 November 2007 12:16:48 GMT
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