SCHEDULE

The SCHEDULE feed is an extract of train schedules from Network Rail's ITPS (Integrated Train Planning System), available in JSON and CIF format.

It is recommend that, if you are just starting out with the service, you use the JSON files. The CIF data is more suited to advanced users of the service and requires additional parsing compared to the JSON data.

= Types of file =

JSON format
The schedule files in JSON format are available for all operators, or for individual operators.

Two types of file are available:


 * A full extract is produced each day, which can be used to initialise your schedule database
 * An update extract is produced each day, which can be applied to the previous update extract to bring your database up-to-date

These files are generated

CIF format
The schedule files in CIF format are only available for all operators. A 'full' extract is available each Friday, and an 'update' extract is available daily.

Two types of file are available:

The CIF User Specification is available from ATOC's website, which details the format of the CIF file and the fields within.
 * A full extract is produced each Friday, which can be used to initialise your schedule database
 * An update extract is produced each day, including Friday, which can be applied to the previous update extract to bring your database up-to-date

= Downloading =

The schedule data is compressed using gzip and is downloaded from Amazon S3 via a private URL which is valid for a few minutes after generation. Authentication will be required either by logging in through the Data Feeds website, or by sending your username and password as part of the HTTP request. On successful authentication, you will receive a 403 redirect to the location of the schedule files. Requests are of the format:

https://datafeeds.networkrail.co.uk/ntrod/CifFileAuthenticate?type=type&day=day

where type determines the TOCs contained in the schedule extract and whether the file is a full schedule or an update file, and day determines which day's update file is downloaded. For example:

https://datafeeds.networkrail.co.uk/ntrod/CifFileAuthenticate?type=CIF_ALL_FULL_DAILY&day=toc-full

would download a full schedule file for all TOCs.

Values for type and day can be one of the following:

DAY should be replaced with the shortened version of the name of the previous day. For example, on Monday, Sunday's ('sun') update should be requested.

A list of TOC Codes is available. Note that the TOC code used in the URL is not the ATOC code as seen in schedule files, but the business code as used in Network Rail systems.

The JSON data files are generated overnight and will be available from around 0600. The CIF files are go through a different process and will be available from around 0100.

Downloading via curl
The schedule file can be downloaded from the command line using the curl utility (included with linux, versions available for other operating systems) with the following syntax:

curl -L -u username:password -o file.gz 'https://datafeeds.networkrail.co.uk/ntrod/CifFileAuthenticate?type=CIF_ALL_FULL_DAILY&day=toc-full'

(Thanks to Jules Self for figuring this syntax out.)

= JSON File Format =

The schedule data in JSON format has a single JSON record per line. The file can be parsed line-by-line to extract the data required. Each schedule file contains:


 * A header row
 * Zero or more TIPLOC records
 * Zero or more association records
 * Zero or more schedule records
 * and an end-of-file (EOF) record.

Each association and schedule record has an action - either 'create' or 'delete'. These are used in update files to add or remove records from the master schedule. In full files, there will be no 'delete' records. Update files must be applied sequentially to a full file.

Record Types
Schedule data contains two types of records:


 * Association records - defining associations between services
 * Schedule records - containing details of the schedules themselves

= Validity =

Associations and schedule validities are between a start date and an end date, and on particular days of the week. They each have a Short Term Planning (STP) indicator field as follows:


 * C - Planned cancellation: the schedule does not apply on this date, and the train will not run. Typically seen on public holidays when an alternate schedule applies, or on Christmas Day.
 * N - STP schedule: similar to a permanent schedule, but planned through the Short Term Planning process
 * O - Overlay schedule: an alteration to a permanent schedule
 * P - Permanent schedule: a schedule planned through the Long Term Planning process

For any date a permanent schedule ('P') is valid, it may be overridden by an overlay ('O') or a planned cancellation ('C'). However, if any two schedules appear to be valid for a particular day, the schedule with the lowest alphabetical STP indicator wins.

= Scheduling Process =

A description of the scheduling process is available on the how scheduling works page. This describes how multiple schedules can be used to describe a specific train service.