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Re: XML Schema WG Comments on XInclude

From: Martin Gudgin <marting@develop.com>
Date: Sat, 19 Jan 2002 12:53:21 -0000
Message-ID: <23fc01c1a0e8$48635210$807ba8c0@greyarea>
To: "Jonathan Marsh" <jmarsh@microsoft.com>, <holstege@mathling.com>, <www-xml-xinclude-comments@w3.org>, "XML Core WG" <w3c-xml-core-wg@w3.org>
Cc: <w3c-xml-schema-wg@w3.org>

----- Original Message -----
From: "Jonathan Marsh" <jmarsh@microsoft.com>
To: <holstege@mathling.com>; <www-xml-xinclude-comments@w3.org>; "XML Core
WG" <w3c-xml-core-wg@w3.org>
Cc: <w3c-xml-schema-wg@w3.org>
Sent: Saturday, January 19, 2002 1:09 AM
Subject: RE: XML Schema WG Comments on XInclude


> > -----Original Message-----
> > From: Mary Holstege [mailto:holstege@mathling.com]
> > Sent: Friday, January 18, 2002 11:06 AM
>
> Thanks for the schema suggestion.  Only in the last week or so have I
> begun using Schema-aware tools to create and validate schemas.
> Hopefully this will reduce silly mistakes!
>
> If we don't decide to restrict the placement of extension elements,
> would the following schema give us the constraint we want?  (Zero or one
> xi:fallback element child, no xi:include children, and anything else
> including non-namespaced elements in any order.)

Unfortunately this content model is non-deterministic in the case where the
xi:fallback element does not appear. Also ##other does not allow unqualified
elements. I think you'll have to go with;

<xs:choice minOccurs='0' maxOccurs='unbounded' >
  <xs:element ref='xi:fallback' />
  <xs:any namespace='##other' processContents='lax' />
  <xs:any namespace='##local' processContents='lax' />
</xs:choice>

as the content model for xi:include

Regards

Martin Gudgin
DevelopMentor

>
> <xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema"
>            xmlns:xi="http://www.w3.org/2001/XInclude"
>            targetNamespace="http://www.w3.org/2001/XInclude">
>
>   <xs:element name="include">
>     <xs:complexType mixed="true">
>       <xs:sequence>
>         <xs:choice minOccurs="0" maxOccurs="unbounded">
>           <xs:any namespace="#other" processContents="lax"/>
>         </xs:choice>
>         <xs:element ref="xi:fallback" minOccurs="0"/>
>         <xs:choice minOccurs="0" maxOccurs="unbounded">
>           <xs:any namespace="#other" processContents="lax"/>
>         </xs:choice>
>       </xs:sequence>
>       <xs:attribute name="href" type="xs:anyURI" use="required"/>
>       <xs:attribute name="parse" use="optional" default="xml">
>         <xs:simpleType>
>           <xs:restriction base="xs:string">
>             <xs:enumeration value="xml"/>
>             <xs:enumeration value="text"/>
>           </xs:restriction>
>         </xs:simpleType>
>       </xs:attribute>
>       <xs:attribute name="encoding" type="xs:string" use="optional"/>
>       <xs:anyAttribute namespace="##other" processContents="lax"/>
>     </xs:complexType>
>   </xs:element>
>
>   <xs:element name="fallback">
>     <xs:complexType mixed="true">
>       <xs:choice minOccurs="0" maxOccurs="unbounded">
>         <xs:element ref="xi:include"/>
>         <xs:any namespace="#other" processContents="lax"/>
>       </xs:choice>
>       <xs:anyAttribute />
>     </xs:complexType>
>   </xs:element>
>
> </xs:schema>
>
> > The full schema:
> >
> >  <xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema"
> >             xmlns:xi=http://www.w3.org/2001/XInclude
> >             targetNamespace="http://www.w3.org/2001/XInclude">
> >    <xs:element name="include">
> >      <xs:complexType mixed="true">
> >        <xs:choice minOccurs="0" maxOccurs="unbounded">
> >          <xs:element ref="xi:fallback"/>
> >          <xs:any namespace="#other" processContents="lax"/>
> >        </xs:choice>
> >        <xs:attribute name="href" type="xs:anyURI" use="required"/>
> >        <xs:attribute name="parse" use="optional" default="xml">
> >          <xs:simpleType>
> >            <xs:restriction base="xs:string">
> >              <xs:enumeration value="xml"/>
> >              <xs:enumeration value="text"/>
> >            </xs:restriction>
> >          </xs:simpleType>
> >        </xs:attribute>
> >       <xs:attribute name="encoding" type="xs:string" use="optional"/>
> >       <xs:anyAttribute namespace="##other" processContents="lax" />
> >     </xs:complexType>
> >   </xs:element>
> >
> >   <xs:element name="fallback">
> >    <xs:complexType mixed="true">
> >      <xs:choice minOccurs="0" maxOccurs="unbounded">
> >        <xs:element ref="xi:include"/>
> >        <xs:any namespace="##other" processContents="lax"/>
> >      </xs:choice>
> >      <xs:anyAttribute namespace="##other" processContents="lax" />
> >    </xs:complexType>
> >  </xs:element>
> > </xs:schema>
> >
> > -- Mary Holstege
> >    for the XML Schema WG
>
Received on Saturday, 19 January 2002 07:54:22 UTC

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