The problem you are seeing is not for validation of the attribute's 
namespace. it is becuase you do not have the prefix d-ty mapped to a 
namespace-uri. When you construct the XmlSchemaValidator [1], you need to 
pass in a Namespace Resolver which maps it to a namespace.

[1] 
http://msdn2.microsoft.com/en-us/library/system.xml.schema.xmlschemavalidator.xmlschemavalidator.aspx


"Zafar Abbas" <someone@s...> wrote in message 
news:e$qqSyl5GHA.4608@T......
> The validator is failing find a namespace for the 'd-ty' prefix. Do you 
> have the schema for that namespace added to the schema set?
>
>
>
> "George" <George@d...> wrote in message 
> news:B0C32C7D-370E-466B-ACB8-F7E4D7C25C5E@m......
>>I am currently developing an xbrl validation software that takes an xml
>> instance file and a lot of schemas(xsd files) and  validates it against 
>> the
>> xsd files.  I am using Visual basic in visual studio 2005. I have managed 
>> to
>> cycle through the xml file , validate most of the variables, however, i 
>> have
>> some problems with the namespaces of some attributes.
>>
>> For example, in my xml instance file,  it says:
>>
>> <xbrldi:typedMember dimension="d-ty:NationalMarketDimension">
>>        <d-ty:NationalMarket>base metals</d-ty:NationalMarket>
>>      </xbrldi:typedMember>
>>
>> In this case, the attribute name is "dimension" and
>>                  the attribute value is "d-ty:NationalMarketDimension".
>> The problem is that "dimension" variable is in one namespace, and
>> "d-ty:NationalMarketDimension" is in another namespace. i execute the
>> following code:
>>
>> validator.ValidateAttribute(reader.name, reader.NamespaceURI,
>> reader.valuevalue, schemainfo)
>>
>> It validates the name "dimension" correctly with the correct namespace,
>> however, the value "d-ty:NationalMarketDimension" should be validated 
>> using
>> the d-ty namespace, which is another x-sd file.
>> The error i get is :
>> Error Message:The 'dimension' attribute is invalid - The value
>> 'd-ty:NationalMarketDimension' is invalid according to its datatype
>> 'http://www.w3.org/2001/XMLSchema:QName' - 'd-ty' is an undeclared 
>> namespace.
>>
>> Can anyone help ?
>> Thank you
>>
>>
>
>