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Re: Schema for schemas bugs?

From: Henry S. Thompson <ht@cogsci.ed.ac.uk>
Date: 24 Apr 2002 11:41:56 +0100
To: "Aung Aung" <aaung@microsoft.com>
Cc: <xmlschema-dev@w3.org>, <www-xml-schema-comments@w3.org>
Message-ID: <f5b662h9y4r.fsf@cogsci.ed.ac.uk>
"Aung Aung" <aaung@microsoft.com> writes:

> Thanks Henry. We are now all waiting for the Errata. The following 2
> issues is for clarification and commonality, please comment for any
> error.

> First thing ~~~~~~~~~~~~~
> You have memtioned that renaming of anySimpleType or anyType is. Will
> there be an errata for this? Below is a mail from you from 11/01.

The WG haven't gotten to this one yet.  What follows is only my
personal opinion.

> >> 1.
> >> <xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema" >
> >>       <xs:simpleType name="ct1">
> >>             <xs:restriction base="xs:anyType" />
> >>       </xs:simpleType>
> >> </xs:schema>
> 
> >Yes, invalid.

No erratum required, user-deriving a simple from a complex is already
disallowed.

> >> 2.
> >> <xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema" >
> >>       <xs:simpleType name="ct2">
> >>             <xs:restriction base="xs:anySimpleType" />
> >>       </xs:simpleType>
> >> </xs:schema>
> 
> >Yes, invalid.

Needs an erratum, one way or another.

> >> 3.
> >> <xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema" >
> >>       <xs:complexType name="ct4">
> >>             <xs:simpleContent>
> >>                   <xs:restriction base="xs:anySimpleType" />
> >>             </xs:simpleContent>
> >>       </xs:complexType>
> >> </xs:schema>
> 
> >Yes, invalid.

Needs an erratum, one way or another.

> >But you raise an interesting point -- the above don't actually attempt 
> >a restriction, just a private renaming.  There's no reason we shouldn't
> >allow this.  The third case in particular, if it contained attributes,
> is >something people might reasonably wish to do.
> 
> >I'll raise a potential erratum on this.
> >Ht
> 
> In short, I think we will need the following 2 points in errata.
> (1) allow renaming of anyType or AST
> (2) Restriction with facets on anySimpleType is not allowed unless the
> restriction is build-in dataTypes (to satisfy SfS).

-- 
  Henry S. Thompson, HCRC Language Technology Group, University of Edinburgh
          W3C Fellow 1999--2002, 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/
 [mail really from me _always_ has this .sig -- mail without it is forged spam]
Received on Wednesday, 24 April 2002 06:41:59 GMT

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