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Re: XML Schema question re: duplicate element definitionswhen

• From: Rick Jelliffe <rjelliffe@a...>
• To: XML Dev <xml-dev@l...>
• Date: Fri, 09 Mar 2007 17:35:39 +1100

In your case, the elements are locally scoped, yes. It has nothing to do 
with elementFormDefault. They are local elements because they are 
specified using the name attribute, not references (to a global element 
with that name.) The fact that they are specified using a direct type 
rather than a type reference also does not change that they are locally 
scoped.

What the elementFormDefault has to do with is which namespace these 
elements are in. You can have a local element and a global element with 
different type definitions both of which have the same element name and 
namespace.

Cheers
Rick Jelliffe

Anne Thomas Manes wrote:
> Is this valid?
>
> <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...>