Identifes the primary language preference for the message. The human language is identified by ISO 639 codes.

A 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).

Used to request the version of the payload message desired for the response.

A unique identifying value assigned by the creating system. The ID attribute may be used to reference a primary-key value within a database or in a particular implementation.

A reference for additional message identification, assigned by the requesting host system. When a request message includes an echo token the corresponding response message MUST include an echo token with an identical value.

For all OTA versioned messages, the version of the message is indicated by a decimal value.

A generic message, available as an action on several OTA services
which requests a server to delete the business object
identified by the UniqueID element.

Identifies the company that is associated with the UniqueID.

The identification of a record as it exists at a point in time. An instance is used in update messages where the sender must assure the server that the update sent refers to the most recent modification level of the object being updated.

Indicates the creation date and time of the message in UTC using the following format specified by ISO 8601; YYYY-MM-DDThh:mm:ssZ with time values using the 24 hour clock (e.g. 20 November 2003, 1:59:38 pm UTC becomes 2003-11-20T13:59:38Z).

Used to provide the company common name.

An identifier used to uniquely reference an object in a system (e.g. an airline reservation reference, customer profile reference, booking confirmation number, or a reference to a previous availability quote).

Used to identify the source of the identifier (e.g., IATA, ABTA).

Identifies the context of the identifying code, such as DUNS, IATA or internal code, etc.

Identifies the alternate language for a customer or message. The human language is identified by ISO 639 codes.

Identifies a company by the company code.

This indicates where this message falls within a sequence of messages.

Used to identify the sequence number of the transaction as assigned by the sending system; allows for an application to process messages in a certain order or to request a resynchronization of messages in the event that a system has been off-line and needs to retrieve messages that were missed.

Refer to OTA Code List Travel Sector (TVS).

URL that identifies the location associated with the record identified by the UniqueID.

Used to indicate whether the request is for the Test or Production system.

The department name or ID with which the contact is associated.

When true, indicates the message is being re-sent after a failure. It is recommended that this attribute is used (i.e., set to TRUE) only when a message is retransmitted.

A reference to the type of object defined by the UniqueID element. Refer to OTA Code List Unique ID Type (UIT).

The division name or ID with which the contact is associated.