Revision as of 16:12, 27 January 2015

Schedule messages

Overview

Darwin provides schedule information when a train is activated, or when new schedule, or changes to an existing schedule are received.

Schedules cover the complete journey of a single train, and are always sent in full. Changes replace any previous version of a schedule that may have been received.

Darwin identifies trains by RID, whereas TRUST identifies trains by a 10-character identity.

Detail

A schedule may be received in two ways:

Via the Push Port inside inside a uR element, along with a TS element, which initialises the predictions held for this schedule. An association may also be included if this train splits, joins or there is a 'next train' association
Via the Darwin Timetable

A schedule message comprises of an origin, zero or more intermediate locations and a terminating location.

Example message

<schedule rid="201411200059826" uid="P63461" trainId="2K33" ssd="2014-11-20" toc="LM">
  <sc:OR tpl="DORIDGE" act="TB" ptd="13:09" wtd="13:09" />
  <sc:PP tpl="BNHTX" wtp="13:11" />
  <sc:IP tpl="WDNYMNR" act="T " pta="13:14" ptd="13:14" wta="13:13:30" wtd="13:14" />
  <sc:DT tpl="KDRMNST" act="TF" pta="14:10" wta="14:10" />
</schedule>

Location types

Darwin has five types of location, each with a number of attributes:

Tag	Description	act	pta	wta	wtp	ptd	wtd
OR	Origin	Y				Y	Y
PP	Passing point				Y
IP	Intermediate point (call)	Y	Y	Y		Y	Y
OPIP	Operational stop			Y			Y
DT	Destination	Y	Y	Y