message listTimeZonesRequest
parts 
parameters
element workcal:listTimeZones
used by 
Operation listTimeZones in PortType WorkCalService
source 
<wsdl:message name="listTimeZonesRequest">
  <wsdl:part name="parameters" element="workcal:listTimeZones"/>
</wsdl:message>

WSDL documentation generated by XMLSpy WSDL Editor http://www.altova.com/xmlspy