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I tried the schema on MSFT .NET's XmlValidatingReader and got the following
message
ERROR: The 'http://www.w3.org/2001/XMLSchema:documentBody' element is not
declared.
which I think is correct and the wrong answer is that being given by XSV and
Xerces.
From section 3.15.3 [Constraints on XML Representations of Schemas] of the W3C
XML schemas Structures recommnedation, part 2.2.1 states that
"Where the type of an attribute information item in a document involved in
·validation· is identified as ·QName·, its ·actual value· is composed of a
local name and a namespace name. Its ·actual value· is determined based on
its ·normalized value· and the containing element information item's [in-scope
namespaces] following [XML-Namespaces]:
The appropriate case among the following must be true:
2 otherwise (its ·normalized value· is unprefixed) all of the following must
be true:
2.1 its ·local name· is its ·normalized value·.
2.2 The appropriate case among the following must be true:
2.2.1 If there is a namespace in the [in-scope namespaces] whose [prefix] has
no value, then its ·namespace name· is the [namespace name] of that
namespace." [0]
So from the above, this seems to mean when trying to resolve the qname of
documentBody in the ref attribute of the element it ends up as
http://www.w3.org/2001/XMLSchema:documentBody.
But looking at section 3.3.2 [XML Representation of Element Declaration Schema
Components] it should be noted in the table for the element Element
Information Item there exists the following
Element Declaration Schema Component
Property Representation
{target namespace} The ·actual value· of the targetNamespace
[attribute] of the parent <schema> element information item, or ·absent· if
there is none
so the from the documentBody's declaration it actually has no targetNameSpace.
Thus its qname should be "documentBody".
Thus the MSFT error message seems to be correct since there is no documentBody
element declared in the http://www.w3.org/2001/XMLSchema namespace while XSV
and Xerces look like they are incorrect.
--
THINGS TO DO IF I BECOME AN EVIL OVERLORD #18
I will not have a son. Although his laughably under-planned attempt to usurp
power would easily fail, it would provide a fatal distraction at a crucial
point in time.
----- Original Message -----
From: "Takuki Kamiya" <takuki@pacbell.net>
To: <xml-dev@lists.xml.org>
Sent: Friday, December 28, 2001 1:59 PM
Subject: [xml-dev] qname resolution question
> Hi,
>
> I am wondering if the following schema is valid or not.
> (I tend to think it is invalid.)
>
> Both XSV and xerces passes validation with it.
>
> What is the namespace name for the "documentBody"
> qname below? Is it "http://www.w3.org/2001/XMLSchema";,
> or is it none (as targetNamespace is not provided)?
>
> Thanks in advance.
>
>
> <?xml version ="1.0"?>
> <schema xmlns="http://www.w3.org/2001/XMLSchema"; >
>
> <element name = "envelope">
> <complexType>
> <sequence>
> <element ref = "documentBody"/>
> </sequence>
> </complexType>
> </element>
>
> <element name = "documentBody" type="anyType"/>
>
> </schema>
>
> -Takuki Kamiya
>
>
>
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