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   Re: Please clarify meaning of use="..." for attributes

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  • From: Wayne Steele <xmlmaster@hotmail.com>
  • To: Steve.Tolkin@FMR.COM, xml-dev@lists.xml.org
  • Date: Thu, 02 Nov 2000 11:44:12 -0800 (PST)

>Which of the next two comments is correct?
># answer attribute cannot be provided, and infoset has answer="42"
># answer attribute can be omitted, producing 42; or if provided must have
>value 42.
><attribute name="answer" use="fixed" value="42"/>

The latter choice is correct.

>And when would I ever want to say prohibited? Why would't I just omit the
># answser attribute cannot be provided
><attribute name="answer" use="prohibited"/>

This is useful if you are deriving from a type where the answer attribute is 
optional; and you wish to restrict this to always be absent.

-Wayne Steele

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