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   Re: XML Schemas: Adding nullable="true" to a ref element

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  • From: ht@cogsci.ed.ac.uk (Henry S. Thompson)
  • To: "Roger L. Costello" <costello@mitre.org>
  • Date: Tue, 12 Sep 2000 21:20:28 +0100

"Roger L. Costello" <costello@mitre.org> writes:

> Is this legal:
> <element name="elevation" type="positiveInteger"/>
> <element name="aircraft">
>    <complexType>
>       <element ref="a:elevation" nullable="true"/>
>    </complexType>
> </element>


Which aspect of the documentation [1] did you find difficult to
interpret in this regard?  The case which covers <element ref='...'.../>
says explicitly:

{nullable}      The lexical [value] of the nullable [attribute], if
                present, otherwise the {nullable} of [the def'n referred to]


[1] http://www.w3.org/TR/xmlschema-1/#declare-element
  Henry S. Thompson, HCRC Language Technology Group, University of Edinburgh
          W3C Fellow 1999--2001, part-time member of W3C Team
     2 Buccleuch Place, Edinburgh EH8 9LW, SCOTLAND -- (44) 131 650-4440
	    Fax: (44) 131 650-4587, e-mail: ht@cogsci.ed.ac.uk
		     URL: http://www.ltg.ed.ac.uk/~ht/


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