Associating ServiceData with PortTypes
Modeled state elements as “serviceData elements”
SDE is an extension and restriction of XSD:element
SDEs are declared within a WSDL interface
 <gwsdl:portType name="NCName"> *
      <wsdl:documentation .... /> ?
      <wsdl:operation name="NCName"> *

      <sd:serviceData name="NCName" … /> *
      <sd:staticServiceDataValues>?
         <some element>*
      </sd:staticServiceDataValues>

   </gwsdl:portType>