Darwin Push Port Destinations

[Richie Hughes]

Hi all,

I have been processing the push port schedule messages and I have noticed that the Chester to Liverpool train has Chester as the origin and destination. Does anyone have any idea on how to get the information that I can use to display the correct destination of Liverpool Central (and then Chester for trains that are on the return journey).

I've had a look at the push messages and can't seem to find anything which will help with this -  I've had a look at the FTP site and found the "via" elements but this only says "via Liverpool" and the station is "LVRPLSL" and not Liverpool Central.

If it helps, the departure board API has a falseDest variable which is populated as Liverpool Central and then null when returning back to Chester. It would be good to understand how this is populated.

Many thanks,

Rich 

[Peter Hicks]

Hi Richie

There are two things you need:

First, where a location has an "fd" (false destination), when you're showing trains at the "tpl" for that stop, you should show the destination as the value of the "fd".

For example, a West Kirkby - West KIrby West Kirby service via Liverpool Central will have a false destination of LIVRPLCL up until James Street, so you should display it as a "Liverpool Central" train up until James Street, but from Moorfields onwards, you should display it as a "West Kirby" train.

Second, the reference data contains a list of 'via' locations.  For each "at" location identified by CRS code, you need to look at the "dest" location (TIPLOC) and see if the train goes via the "loc1" and optionally "loc2" TIPLOCs.  If it does, then display the "viatext" - but only for the CRS code.

For example:

  <Via at="CTR" dest="CHST" loc1="LVRPLSL" viatext="via Liverpool" />

At Chester (CTR), a train with a destination of CHST (Chester) and a TIPLOC of LIVRPLSL (Liverpool Lime Street - Low Level) after the "at" location and before the "dest" should be displayed as "via Liverpool".

Look for the false destination and then any 'via' location first, otherwise you may end up displaying a train as "Liverpool Central via Liverpool Central" if its false destination happens to be Liverpool Central!

Peter

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