ExtensionReasonCode Extension Reason Code 2.0 urn:oasis:names:specification:ubl:codelist:gc:ExtensionReasonCode urn:oasis:names:specification:ubl:codelist:gc:ExtensionReasonCode-2.0 http://docs.oasis-open.org/ubl/os-ubl-2.0/cl/gc/default/ExtensionReasonCode-2.0.gc OASIS Universal Business Language UBL Code Name CodeKey