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RE: XML Schema question re: duplicate element definitions when

• From: "Michael Kay" <mike@s...>
• To: "'Anne Thomas Manes'" <atmanes@g...>,"'XML Dev'" <xml-dev@l...>
• Date: Thu, 8 Mar 2007 12:45:48 -0000

> 
> Is this valid?

Yes.

It's also permissible for the two elements named foobar to have different
content models.

Michael Kay
http://www.saxonica.com/

> 
> <schema xmlns="http://www.w3.org/2001/XMLSchema"
>    targetNamespace="urn:example:duplicateElements"
>    elementFormDefault="qualified">
>   <complexType name="foo">
>     <sequence>
>       <element name="foobar" type="string"/>
>     </sequence>
>   </complexType>
>   <complexType name="bar">
>     <sequence>
>       <element name="foobar" type="string"/>
>     </sequence>
>   </complexType>
> </schema>
> 
> Note two elements named "foobar".
> 
> XML Schema spec [1] says:
> 
> "Locally scoped attribute and element declarations are 
> special with regard to symbol spaces. Every complex type 
> definition defines its own local attribute and element 
> declaration symbol spaces, where these symbol spaces are 
> distinct from each other and from any of the other symbol 
> spaces. So, for example, two complex type definitions having 
> the same target namespace can contain a local attribute 
> declaration for the unqualified name "priority", or contain a 
> local element declaration for the name "address", without 
> conflict or necessary relation between the two."
> 
> But given that the schema specifies 
> elementFormDefault="qualified", are the "foobar" elements 
> locally scoped?
> 
> [1] http://www.w3.org/TR/xmlschema-1/#concepts-nameSymbolSpaces
> 
> Thanks,
> Anne
> 
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• References:
  • XML Schema question re: duplicate element definitions when using elementFormDefault="qualified"
    • From: "Anne Thomas Manes" <atmanes@g...>