DEI - Values used in the SSM/ASM messages (this is not a sub-message):

SSM - Standard Schedules Message

NEW - Insertion of New Flight Information

This sub-message inserts a new Flight Designator or adds new Periods of Operation and/or new Day(s) of Operation (at the Frequency Rate, if stated) for an existing Flight Designator. When used in conjunction with an SKD sub-message, the data contained in the NEW submessage supersedes the data, if any, for the period specified by its associated SKD sub-message.

Format of message:

Examples, single-leg (s-leg) and multi-leg (m-leg) flights, both domestic (dom), Schengen (sch) and Non-Schengen (non-s):

CNL - Cancellation of Flight Information

This sub-message cancels (i.e. withdraws) the complete routing of a Flight Designator within the Period and on the Day(s) of Operation (and at the Frequency Rate, if stated).

Examples, one flight or several flights at the same time:

RPL - Replacement of Existing Flight Information

This sub-message replaces all existing information pertaining to a Flight Designator within the Period and on the Day(s) of Operation (at the Frequency Rate, if stated) by the new information. Other Periods and other Day(s) of Operation during the period stated (if existing) are not affected. The extension of periods and/or the addition of days of operation are not permitted using RPL sub-messages.

Examples, one flight or several flights at the same time:

TIM- Change of Time Information

For a specific Flight designator/Period of Operation and day(s) of Operation this sub message changes only the Timing information and/or the conditional data elements (if supplied) that can be transmitted in this type of message.

•Other Periods of Operation/Day(s) of Operation remain unchanged

•Data Elements previously transmitted and therefore already held in a recipients system and not included in the message remain unchanged.

Examples:

FLT - Change of Flight Designator

This sub-message only changes the Flight Designator (and its associated data elements) and/or the Operational Suffix, for the Period and Day(s) of Operation (at the Frequency Rate, if stated).
Other data elements, Periods and Day(s) of Operation of the original Flight Designator and Operational Suffix are not affected.

Examples:

SKD- Schedule Update

This sub-message cancels/deletes all existing information for the Flight Designator specified from the Schedule Validity Effective Date as specified to (and including) the Schedule Validity Discontinue Date, if stated. It indicates that revised schedule information, if any, will follow immediately in one or more associated sub-messages using Action Identifier NEW.

Examples:

EQT- Change of Equipment Information

For a specific Flight designator/Period of Operation and day(s) of Operation this sub message changes only the Equipment information and/or the conditional data elements (if supplied) that can be transmitted in this type of message.

•Other Periods of Operation/Day(s) of Operation remain unchanged.

•Data Elements previously transmitted and therefore already held in a recipients system and not included in the message remain unchanged.

Examples:

ADM- Change of Existing Information

Change of Existing Information Expressed by the Use of Data Element Identifier Only
For a specific Flight designator/Period of Operation and day(s) of Operation this sub message changes only those data elements which are specified by the use of a Data Element Identifier.

•Other Periods of Operation/Day(s) of Operation remain unchanged

•When cancelling existing information the statement ‘NIL’ must be made

•If changes are leg related, replacement data need only be transmitted for legs where the data has changed. For example, in the case of Data Element Identifier 10, it is not necessary to transmit all legs that have Data Element Identifier 10 information, only those legs where DEI 10 needs changing

Examples:

ASM - Ad-Hoc Schedules Message

NEW - Insertion of New Flight Information

This sub-message inserts a new Flight Designator or adds new Periods of Operation and/or new Day(s) of Operation (at the Frequency Rate, if stated) for an existing Flight Designator. When used in conjunction with an SKD sub-message, the data contained in the NEW submessage supersedes the data, if any, for the period specified by its associated SKD sub-message.

Format of message:

Examples, single-leg (s-leg) and multi-leg (m-leg) flights, both domestic (dom), Schengen (sch) and Non-Schengen (non-s):

CNL - Cancellation of Flight Information

This sub-message cancels (i.e. declares as not operating), but retains as part of the basic schedule, one or more flights or parts of flight(s) defined by the Flight Identifier(s) (and Flight Leg Change Identifier, if applicable).
It is recommended that the facility to cancel part of a flight (using ASM/CNL with a Flight Leg Change Identifier) is confined to the operational phase of the flight only since a partial cancellation may lead to a Flight Designator duplication problem if the first leg or a middle leg of a flight is cancelled.
Partial cancellations would normally be communicated unambiguously using ASM/RPL.

Format of message:

Examples, single-leg (s-leg) and multi-leg (m-leg) flights, both domestic (dom), Schengen (sch) and Non-Schengen (non-s):