message folderReferenceFault
parts 
folderReferenceFault
element exception:FolderReferenceFault
used by 
Operation getFolderContent in PortType DocumentService
source  
<wsdl:message name="folderReferenceFault">
  <wsdl:part name="folderReferenceFault" element="exception:FolderReferenceFault"/>
</wsdl:message>

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