Default string max. length at XML validation

[Abra]

Is there any default maximal length for strings in the .NET
inmplementation of XML schema validation (I used a XmlSchemaCollection
in a XmlValidatingReader object) ?
I am getting the following error message at the line containing a
32-character string. The xml file looks like this :

....
<Xmltag1 id="20040501" md5="00123400000000000000000000000000"/>
...
Here is how the xsd file looks like :

...........
<xs:element name="Xmltag1">
<xs:complexType>
<xs:simpleContent>
<xs:extension base="xs:string">
<xs:attribute name="id" type="xs:string" use="required" />
<xs:attribute name="md5" type="xs:string" use="required" />
</xs:extension>
</xs:simpleContent>
</xs:complexType>
</xs:element>
........
If I use a shorter string it works without errors :

....
<Xmltag1 id="20040501" md5="001234000000"/>
...

Thanks in advance for you help.
Regards,
Abra

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[Abra]

I forgot the XML validation error message :

"The 'md5' attribute has an invalide value according to its data type"

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