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RE: nil="true" and xsi:type="xsd:string"

From: Dare Obasanjo <dareo@microsoft.com>
Date: Tue, 12 Mar 2002 11:04:13 -0800
Message-ID: <8BD7226E07DDFF49AF5EF4030ACE0B7E055715D0@red-msg-06.redmond.corp.microsoft.com>
To: "Tom Preston" <tpreston@amadeusboston.com>
Cc: "Stanley Guan" <stanley.guan@oracle.com>, <xmlschema-dev@w3.org>
You are correct, the test is in error. 

We will be contacting the W3C XML Schema WG about the erroneous test. 

-- 
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The artifact which is the source of my power will not be kept on the Mountain
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will be in my safe-deposit box. The same applies to the object which is my 
one weakness.


> -----Original Message-----
> From: Tom Preston [mailto:tpreston@amadeusboston.com] 
> Sent: Friday, March 01, 2002 1:48 PM
> To: Stanley Guan; xmlschema-dev@w3.org
> Subject: RE: nil="true" and xsi:type="xsd:string"
> 
> 
> Sorry,  hit send by mistake::
> 
> hum...so the page says that it shouldn't be valid, and yet it 
> passes validation...
> 
> I don't know why it would be wrong:
> 
> spec says:
> 2.6.1 xsi:type
> The Simple Type Definition (§2.2.1.2) or Complex Type 
> Definition (§2.2.1.3) used in ·validation· of an element is 
> usually determined by reference to the appropriate schema 
> components. An element information item in an instance may, 
> however, explicitly assert its type using the attribute 
> xsi:type. The value of this attribute is a ·QName·; see QName 
> Interpretation (§3.15.3) for the means by which the ·QName· 
> is associated with a type definition. 
> 
> Further:
> "anySimpleType can be considered as the ·base type· of all 
> ·primitive· types. "
> 
> And:
> section 3 of 
> http://www.w3.org/TR/2001/REC-xmlschema-2-20010502/datatypes.html
> says that string falls under anySimpleType.
> 
> 
> Maybe if you set nil to "true" you shouldn't specify a type? :
> 
> http://www.w3.org/TR/xmlschema-1/#xsi_nil
> 2.6.2 xsi:nil
> XML Schema: Structures introduces a mechanism for signaling 
> that an element should be accepted as ·valid· when it has no 
> content despite a content type which does not require or even 
> necessarily allow empty content. An element may be ·valid· 
> without content if it has the attribute xsi:nil with the 
> value true. An element so labeled must be empty, but can 
> carry attributes if permitted by the corresponding complex type.
> 
> Seems to say that the type attribute should be acceptable.
> 
> So, I don't know why it should fail...
> 
> TOm
> 
> -----Original Message-----
> From: Stanley Guan [mailto:stanley.guan@oracle.com]
> Sent: Friday, March 01, 2002 12:36 PM
> To: xmlschema-dev@w3.org
> Cc: Schema XML; schema-ig w3c
> Subject: Re: nil="true" and xsi:type="xsd:string"
> 
> 
> Tom,
> 
> If you follow the following link and look the row for 
> elemZ001, you can find the expected result:
>  
> http://www.w3.org/XML/2001/05/xmlschema-test-collection/result
> -ms-element.ht
> m
> which is invalid!
> 
> As I recall, Henry has posted that:
>    * xs:string is not a valid restriction of xs:anySimpleType.  (ht)
> 
> 
> Thx,
> 
> -Stanley
> 
> Tom Preston wrote:
> 
> > For me it validated with strict validation in XSV and it validated 
> > with xerces 144 and xerces 200.  Doesn't seem to be invalid.
> >
> > Tom
> >
> > -----Original Message-----
> > From: Stanley Guan [mailto:stanley.guan@oracle.com]
> > Sent: Thursday, February 28, 2002 6:23 PM
> > To: Schema XML; schema-ig w3c
> > Subject: xsi:nil="true" and xsi:type="xsd:string"
> >
> > Hi,
> >
> > Can someone shed some light on why elemZ001.xml is invalid? (see
> >
> http://www.w3.org/XML/2001/05/xmlschema-test-collection/result
-ms-element.ht
> m)
>
> Thx,
>
> -Stanley
>
> elemZ001.xsd
> ----------------
> <?xml version="1.0"?>
> <xsd:schema xmlns:xsd="http://www.w3.org/2001/XMLSchema">
>  <xsd:element name="root">
>   <xsd:complexType>
>    <xsd:sequence>
>     <xsd:element ref="uid" maxOccurs="unbounded"/>
>    </xsd:sequence>
>   </xsd:complexType>
>  </xsd:element>
>  <xsd:element name="uid" nillable="true"/>
> </xsd:schema>
>
> elemZ001.xml
> ----------------
> <?xml version="1.0"?>
> <root xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
> xmlns:xsd="http://www.w3.org/2001/XMLSchema"
> xsi:noNamespaceSchemaLocation="elemZ001.xsd">
>  <uid xsi:nil="true" xsi:type="xsd:string"/>
>  <uid xsi:nil="true"/>
> </root>
Received on Tuesday, 12 March 2002 14:04:55 GMT

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