2.5.7.2 ComHandler Action

If present, this field specifies a custom handler.<32><33>

 <!-- ComHandler -->
 <xs:complexType name="comHandlerType">
    <xs:complexContent>
       <xs:extension base= "actionBaseType ">
          <xs:all>
             <xs:element name="ClassId" type="guidType"/>
             <xs:element name="Data" type="dataType" minOccurs="0"/>
          </xs:all>
       </xs:extension>
    </xs:complexContent>
 </xs:complexType>

ClassId: This field is not optional and contains a GUID of the custom handler's COM class (see section 2.5.1.5).

Data: If present, this field contains a fragment of XML.