Re: Uniqueness of attribute names

Robin LaFontaine <robin@monsell.co.uk> writes:

> In the element named 'schema' in the definition of XML Schema, there
> is a constraint:
> 
> 
>     <key name="attribute">
>      <selector>attribute</selector>
>      <field>@name</field>
>     </key>
> 
> which indicates that the 'name' attribute is a key for the element
> called attribute.
> 
> 
> Why is there not a corresponding constraint within the element named
> 'complexType' (and indeed in attributeGroup) in order to constrain all
> its attributes to have different names? According to XML 1.0 it is
> surely the case that whenever we have multiple attributes in an
> element definition, they can always be distinguished by their 'name'
> (which is an attribute in XML schema).
> 
> 
> Therefore I would have thought that there would be a simile constraint
> as above within complexType (and attributeGroup).

Good idea, thanks!

ht
-- 
  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/

Received on Thursday, 17 August 2000 08:45:44 UTC