Is it possible to validate XML against fragments of a SCHEMA?

Is it possible to validate XML against fragments of a SCHEMA? For example, my XML below refers to several different elements in the SCHEMA. Currently, I am validating the entire XML structure against the SCHEMA but now I want to only validate certain elements. Is it possible to validate just the AttributeGroupLink element from my XML against the AttributeGroupLink element in the SCHEMA?

My XML being validated:

<Attribute ID="070_23000 " FullTextIndexed="false" ExternallyMaintained="false" ProductMode="Normal" Derived="false">
<Name>Abduction 160 degrees</Name>
<Validation BaseType="text" />
<AttributeGroupLink AttributeGroupID="Product Specification" />
<LinkType LinkTypeID="P" />
</Attribute>

My Code to validate XML against a SCHEMA.

XmlReaderSettings settings = new XmlReaderSettings();
settings.ValidationType = ValidationType.Schema;
settings.Schemas.Add(null, @"c:\\stepexmlschema.xsd");
settings.ValidationEventHandler += delegate(object sender, ValidationEventArgs vargs)
{
//Console.WriteLine("{0}: {1}", vargs.Severity, vargs.Message);
errortext = vargs.Severity + " " + vargs.Message + " Line # = " + vargs.Exception.LineNumber + " Line Pos = " + vargs.Exception.LinePosition;

txtData.Text = string.Format("{0}{1}{2}\r\n", txtData.Text, errortext, ValidateCnt++);
XMLErrors++;

};
using (XmlReader reader = XmlReader.Create(dlgSave.FileName.ToString(), settings))
//using (XmlReader reader = XmlReader.Create(@"c:\\FULLExported.xml", settings))
{
while (reader.Read()) {
ValidateCnt++;
}
}

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Sure...see snippet.

        static void Main(string[] args)
        {
            string xmlToValidate = @"
    <Attribute ID='070_23000 ' FullTextIndexed='false' ExternallyMaintained='false' ProductMode='Normal' Derived='false'>
      <Name>Abduction 160 degrees</Name>
      <Validation BaseType='text' />
      <AttributeGroupLink AttributeGroupID='Product Specification' />
      <LinkType LinkTypeID='P' />
    </Attribute>";
            string schemaText = @"
<xs:schema xmlns:xs='http://www.w3.org/2001/XMLSchema'>
    <xs:element name='AttributeGroupLink'>
        <xs:complexType>
            <xs:attribute name='AttributeGroupID' type='xs:string' use='required' />
        </xs:complexType>
    </xs:element>
</xs:schema>
";
            XmlDocument doc = new XmlDocument();
            doc.LoadXml(xmlToValidate);  // load xml using DOM model
            StringReader reader = new StringReader(schemaText);
            XmlSchema subSchema = XmlSchema.Read(reader, ValidationEventHandler);
            subSchema.Compile(ValidationEventHandler);
            reader.Close();
 
            // pick your node
            XPathNavigator nav = doc.DocumentElement.CreateNavigator();
            foreach (XPathNavigator x in nav.Select("//AttributeGroupLink"))
            {
                XmlDocument subDocument = new XmlDocument();
                subDocument.LoadXml(x.OuterXml);
                subDocument.Schemas.Add(subSchema);
                subDocument.Validate(ValidationEventHandler);
            }
        }
 
        static void ValidationEventHandler(object sender, System.Xml.Schema.ValidationEventArgs args)
        {
            if (args.Severity == XmlSeverityType.Warning)
                Console.Write("\nWARNING: ");
            else if (args.Severity == XmlSeverityType.Error)
                Console.Write("\nERROR: ");
 
            Console.WriteLine(args.Message);
        }

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Is it possible to validate XML against fragments of a SCHEMA?

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