POST /GroupManagementService HTTP/1.1 Host: www.groupmanagementserver.com Content-Type: text/xml; charset="utf-8" Content-Length: nnnn SOAPAction: "http://www.imsglobal.org/soap/gms/replaceGroup" AB12345e4t6789 oldsource:oldidentifier oldsource:oldidentifier TaxonomySource Instruction 1 http://www.hogswort.ac.uk