All Schema files in the OpenTravel Alliance specification are made available according to the terms defined by the OpenTravel License Agreement at http://www.opentravel.org/Specifications/Default.aspx. This message provides a detailed service history for the reservation requested. Indicates successful processing of an OpenTravel message. Used in conjunction with a successful processing of an OpenTravel message to provide warnings. Specifies the reservation control information or the guest's booking ID. The status and last modified date of this reservation. Specifies the sailing information for a reservation. A collection of booking history info items. Used to provide history of the booking. Collection of changed items. History item details. Unique identifier of the guest to whom this transaction applies. The item being modified in this transaction. Specifies the old value of an item. Specifies the new value of an item. Specifies the classification of the item (e.g., RES_GUEST, RES_HEADER). Specifies a general category of history items or type of history item (e.g., RESERVATION, TRANSACTION). A collection of errors that occurred during the processing of a message. The standard attributes that appear on the root element for all OpenTravel Messages. Indicates that additional records are available and provides the echo token to be used to retrieve those records.