TimB wrote:
> Does anyone know when the issue identified in the following knowledge base 
> article will be fixed with a service pack to the .Net Framework version 3.5?
> 
> http://support.microsoft.com/default.aspx/kb/826753
> 
> This issue prevents empty elements or attributes that have a minLength 
> greater than zero from being identified as validation errors when validating 
> an xml document using a schema.

That problem linked to above applies to

•	Microsoft XML Core Services 4.0
•	Microsoft XML Core Services 4.0 Service Pack 1
•	Microsoft XML Parser 3.0 Service Pack 3
•	Microsoft XML Parser 3.0 Service Pack 2
•	Microsoft XML Parser 3.0 Service Pack 1
•	Microsoft XML Parser 3.0
•	Microsoft XML Parser 2.6
•	Microsoft XML Parser 2.5
•	Microsoft XML Parser 2.0

and not to the .NET framework.

With the .NET framework and a W3C XML schema the problem does not exist:

             XmlReaderSettings xrs = new XmlReaderSettings();
             xrs.ValidationType = ValidationType.Schema;
             xrs.ValidationEventHandler += delegate(object sender, 
ValidationEventArgs vargs)
             {
                 Console.WriteLine("{0}: {1}", vargs.Severity, 
vargs.Message);
             };
             xrs.Schemas.Add(null, @"..\..\XMLSchema1.xsd");

             using (XmlReader rd = 
XmlReader.Create(@"..\..\XMLFile1.xml", xrs))
             {
                 while (rd.Read()) { }
             }

where the schema is as follows:
<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema">
   <xs:element name="root">
     <xs:complexType>
       <xs:sequence>
         <xs:element name="foo">
           <xs:simpleType>
             <xs:restriction base="xs:string">
               <xs:minLength value="2"/>
             </xs:restriction>
           </xs:simpleType>
         </xs:element>
         <xs:element name="bar">
           <xs:complexType>
             <xs:attribute name="baz" use="required">
               <xs:simpleType>
                 <xs:restriction base="xs:string">
                   <xs:minLength value="2"/>
                 </xs:restriction>
               </xs:simpleType>
             </xs:attribute>
           </xs:complexType>
         </xs:element>
       </xs:sequence>
     </xs:complexType>
   </xs:element>
</xs:schema>

and the instance is as follows:
<?xml version="1.0" encoding="utf-8" ?>
<root>
   <foo></foo>
   <bar baz=""/>
</root>


outputs the following two validation errors with Visual Studio 2005:

Error: The 'foo' element is invalid - The value '' is invalid according 
to its datatype 'String' - The actual length is less than the MinLength 
value.
Error: The 'baz' attribute is invalid - The value '' is invalid 
according to its datatype 'String' - The actual length is less than the 
MinLength value.


Or are you still using an XDR schema?

-- 

	Martin Honnen --- MVP XML
	http://JavaScript.FAQTs.com/