Darwin:Train Status Element

Overview

Each time an actual or forecast time for a train changes within Darwin, a 'TS' message is sent. This includes the RID, UID and date of the train and the set of elements that has changed.

'TS' messages do not alter changes to schedules - these will be sent in a 'schedule' element. They will, however, contain information regarding:

Expected and actual arrival and departure times at calling points
Expected and actual times at passing points
Trains which are delayed without any further information
Manually entered delays, where they are known in advance
The source of an expected or actual time
Platform numbers at calling points, including their source and whether they are confirmed or not
Whether a platform number or entire service is suppressed and should not be displayed to the public
Train length, in certain circumstances
Whether a train that divides is running in reverse formation from the dividing location
Whether a train that splits detaches stock from the front of the train
Late running reasons

Detail

TS messages will normally contain an update for a single location with an actual time, followed by forecast times for the rest of the journey. However, earlier locations may be reported if there is a change to report - for example, a manual TRUST input for a previous location.

Actual times

Darwin will provide information about actual arrival, passing and departure times when it becomes known. This may be from TRUST, TD, CIS at a station or manual input.

If no 'actual' time is received (for example, because it is not known), a client should consider this as a 'No Report'.

If an 'actual' time is reported in error, the 'atRemoved' attribute will be set to indicate the actual time has been removed

Forecasts

Darwin will supply forecasts on when a train will arrive, pass or depart a location in the schedule. Only updates to forecasts will be sent - if there are no changes to the forecasted times sent previously, they will not be re-sent with subsequent forecasts.

Forecast updates for a location will only be sent when the forecast differs significantly from the previous value by a minute or more.

Forecasts for locations with public activities are calculated with reference to the public times at locations. All other forecasts are calculated with reference to working timetable times.

NOTE: It is part of the terms and conditions for using the Push Port that, when using data from any part of the Darwin Push Port, that the forecasts made by Darwin are used. This will ensure consistency across all information systems supplied by Darwin and reduce customer confusion.

Platform numbers

Platform numbers may be provided in TS updates. They should not be used for public display if they are suppressed by:

The 'platSup' attribute being set, which indicates the data may not be reliable or confirmed
The 'cisPlatSup' attribute being set, which indicates the platform number has been suppressed by CIS or Darwin Workstation input for operational reasons

Additionally, if the 'suppr' element is set to 'true', displaying any details about the service at that location should be suppressed.

Please ensure your systems adhere to these rules.

Example message

<TS rid="201411200059207" uid="C70164" ssd="2014-11-20">
  <fc:Location tpl="LOGHBRO" wta="09:41:30" wtd="09:43" pta="09:41" ptd="09:42">
    <fc:arr at="09:41" src="TD" />
    <fc:dep et="09:42" src="Darwin" />
    <fc:plat platsup="true" cisPlatsup="true">2</fc:plat>
  </fc:Location>
  <fc:Location tpl="LESTER" wta="09:51:30" wtd="09:53:30" pta="09:51" ptd="09:51">
    <fc:arr et="09:51" src="Darwin" />
    <fc:dep et="09:51" src="Darwin" />
    <fc:plat platsup="true" cisPlatsup="true">3</fc:plat>
  </fc:Location>
  <fc:Location tpl="STPX" wta="10:57" pta="10:59">
    <fc:arr et="10:59" wet="10:52" src="Darwin" />
    <fc:plat>2</fc:plat>
  </fc:Location>
</TS>