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- From: "Box, Don" <dbox@develop.com>
- To: xml-dev@ic.ac.uk
- Date: Mon, 27 Dec 1999 20:51:51 -0800
> -----Original Message-----
> From: Tim Bray [mailto:tbray@textuality.com]
> Sent: Monday, December 27, 1999 8:01 PM
> To: xml-dev@ic.ac.uk
> Subject: Re: (Many) XML Schema Questions
>
>
> At 05:15 PM 12/27/99 -0500, Roger Costello wrote:
> >2. The namespace spec clearly indicates that there is
> >no guarantee that there is anything at the URL referenced
> >by a namespace. However, with XML Schemas, it seems
> >that the namespace referenced in an XML instance document
> >must necessarily reference an XML Schema. Is this a violation
> >of the namespace spec
>
> I haven't read a recent schema draft, but if it says what you
> say it says,
> then in my opinion that would be an egregious design error.
Agreed, since I have been using URNs almost exclusively as namespace URIs.
Fortunately, that's not what the schema spec states. Check out section 4.3.2
of the dec. 17 draft (http://www.w3.org/TR/xmlschema-1/#schema-loc) which
describes the 'xsi:schemaLocation' attribute. Also, see
http://lists.w3.org/Archives/Public/www-xml-schema-comments/1999OctDec/0054.
html for James Clark's comments on this attribute.
> It is of course
> not a violation of the namespace spec,
Yes, but if schemas required xmlns to be a URL that refers to the schema
definition, the utility of XML schemas would be greatly diminished given the
current XMLNS recommendation.
DB
http://www.develop.com/dbox
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