xml-dev - Re: Validation of unknown elements using schemas

[ht@cogsci.ed.ac.uk (Henry S. Thompson)]

Eckenberger Axel <Extern.Eckenberger@kmweg.de> writes:

> Hi folks,
> 
>  
> 
> is it possible to check for the existence of an unknown node during validation
> using schemas ???
> 
>  
> 
> e.g.
> 
> <SomeDoc> <!-- valid -->
>     <Name>Test</Name>
>     <XMLFragment>
>         <P>Some arbitrary XML fragments go here</P>
>     </XMLFragment>
> </SomeDoc>
> 
> <SomeDoc> <!-- valid -->
>     <Name>Test</Name>
>     <XMLFragment>
>         <DIV>Some arbitrary XML fragments go here</DIV>
>     </XMLFragment>
> </SomeDoc>
> 
> <SomeDoc> <!-- not valid -->
>     <Name>Test</Name>
>     <XMLFragment>
>     </XMLFragment>
> </SomeDoc>
> 
> <SomeDoc> <!-- not valid -->
>     <Name>Test</Name>
>     <XMLFragment>
>         <P>Some arbitrary XML fragments go here</P>
>         <P>Some arbitrary XML fragments go here</P>
>     </XMLFragment>
> </SomeDoc>
> 
> 
> SomeDoc, Name and HTMLFragment are part of the schema, but the
> content of HTMLFragment has to be exactly one XML Element, although
> it does not matter what it is.

Sure -- use <any> [1] , it takes occurence indicators like any other
content model particle:

<xs:element name="XMLFragment">
 <xs:complexType>
  <xs:sequence>
   <xs:any/>
  </xs:sequence>
 </xs:complexType>
</xs:element>

This requires exactly one element as the content of XMLFragment, but
puts no constraints on its name, content, attributes or namespace.  <any> 
offers options to constrain the namespace, see the PWD.

ht

[1] http://www.w3.org/TR/xmlschema-1/#Wildcard
-- 
  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/