File.xsd and duplicate ID value

[Giuseppe]

Hello,
Here's a sample of a file.xsd and file.xml I wrote :

File.xsd:
<?xml version="1.0" encoding="utf-8" ?>
<xs:schema id="LogErrori" targetNamespace="http://tempuri.org/LogErrori.xsd"
elementFormDefault="qualified"
.........
.........
<xs:sequence>
<xs:element name="ID" type="xs:ID" minOccurs="0" />
<xs:element name="Utente" type="xs:string" minOccurs="0" />
.........
.........

</xs:sequence>
.......
.......
</xs:schema>

File.xml
<?xml version="1.0" standalone="yes" ?>
- <NewDataSet>
- <Eccezione>
<ID>1</ID>
<Utente>INFORLUAR</Utente>
<Messaggio>Nuova eccezione catturata</Messaggio>
<Provenienza>Form: ASP.formPaginaCopertina_aspx</Provenienza>
<IP>127.0.0.1</IP>
<Data>11/10/2003 16.27.22</Data>
</Eccezione>
- <Eccezione>
<ID>1</ID>
<Utente>INFORLUAR</Utente>
<Messaggio>Nuova eccezione catturata</Messaggio>
<Provenienza>Form: ASP.formPaginaCopertina_aspx</Provenienza>
<IP>127.0.0.1</IP>
<Data>12/10/2003 15.33.19</Data>
</Eccezione>
</NewDataSet>

In this file.xml there are two ID=1
Must exist one ID=1

I use the Load method to load the XmlDataDocument
but I get no exception for the double ID value

Dim ds As New DataSet
ds.EnforceConstraints = True
ds.ReadXmlSchema("C:\Inetpub\wwwroot\Comunicazioni IconArchive\LogErrori.xsd"
)
Dim xmlDataDoc As XmlDataDocument = New XmlDataDocument(ds)
xmlDataDoc.Load(ConfigurationSettings.AppSettings( "RegistrazioneErroriXML"))

Can someone suggest a better way to relieve the exception ?

Thanks
Giuseppe