The error ID uniquely identifies the error instance. Code to indicate the class of this error. Description of error condition Source of error The StackTrace will be returned when an API Setting is on. A warning or information about the booking process just performed may be returned with the booking. Describes any errors that occur during system operation. Defines the required timeout period of the session, in whole seconds. NOTE: The API session manager can choose to ignore/override this value. Defines the client prefered language. This language is used to report back errors and user messages. Defines whether a sequence number will be attached to each API transactional response. An increasing sequence number is returned on each API response. The value can be monitored by the client to ensure that there are no intruders using the hijacked session. The client can then terminate the session to prevent abuse. Defines the maximum number of transactions that can occur on the session. The session is automatically disabled when this maximum number of transactions has occured. This policy prevents abuse by intruders.