• To: jlowery@s... (Jeff Lowery)
• Subject: Re: Subtyping in XML
• From: John Cowan <jcowan@r...>
• Date: Thu, 5 Sep 2002 23:09:34 -0400 (EDT)
• Cc: ht@c... ('ht@c...'), xml-dev@l... ("Xml-Dev (E-mail)"), paulp@p... (Paul Prescod), dareo@m... ('Dare Obasanjo')
• In-reply-to: <D60D8F448216D611A21A00508B62B5BC5D2A@e...> from "Jeff Lowery" at Sep 05, 2002 03:33:24 PM

Jeff Lowery scripsit:
> 
> I thought someone else would note that the DTD
> 
> <!ELEMENT MY-NON-BOOLEAN ((TRUE | FALSE)?, (TRUE | FALSE))>
> 
> is nondeterministic and therefore not allowed by XML Schema.  

But of course its RNG equivalent

start = element MY-NON-BOOLEAN {(true | false)?, (true | false)}
true = element TRUE {empty}
false = element FALSE {empty}

works like a champ.

-- 
John Cowan  jcowan@r...  www.ccil.org/~cowan  www.reutershealth.com
"If I have seen farther than others, it is because I am surrounded by dwarves."
        --Murray Gell-Mann

• References:
  • RE: Subtyping in XML
    • From: Jeff Lowery <jlowery@s...>

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