| DocURL | If present, this attribute refers to an online description of the error that occurred. |
 ErrorCode | The ErrorCode attribute MUST be present and is defined as free-text with a list of recommended enumerated values, to indicate the error type. |
| ErrorMessage | A textual description to provide more information about the specific error. |
| Severity | An optional indicator to reflect the severity of this condition. |
| Status | An indication of the processing that was completed on the request message. An error response may be returned and no action taken on behalf of the request message, or there may be some action taken, or the full action may have been completed. |
| AltLangID | The alternate language for a customer or message encoded as ISO 639-3. |
| CorrelationID | Allows end-to-end correlation of log messages with the corresponding Web service message throughout the processing of the Web service message. |
| EchoToken | A reference for additional message identification, assigned by the requesting host system. |
| PrimaryLangID | The primary language preference for the message encoded as ISO 639-3. |
| RetransmissionIndicator | When true, indicates the message is being re-sent after a failure. |
| SequenceNmbr | The sequence number of the transaction assigned by the sending system for ordered message processing or message resynchronization. |
| Target | Test or Production target system indicator. |
| TargetName | The name of the Test or Production system. |
| TimeStamp | ISO 8601 encoded timestamp indicating the creation date and time of the message. |
| TransactionIdentifier | Unique identifier to relate all messages within a transaction (e.g. this would be sent in all request and response messages that are part of an on-going transaction). |
| TransactionStatusCode | This indicates where this message falls within a sequence of messages. |
| Version | The OpenTravel message version indicated by a decimal value. |