http://www.w3.org/2005/08/addressing/fault Key#123456789 urn:uuid:3C8E5964-DFC1-4BCA-A13C-B7B2CCD1684B urn:uuid:9AE4B05F-0A6F-4E19-B04C-B4FCCBA656DA echo:EmptyEchoString The echo string was empty.