stuving
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« Reply #228 on: October 23, 2020, 10:01:26 am » |
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The natural habitat of station codes is the data feeds, where they are defined in the stations file of each set of files (fares, timetabling, and routeing guide). In the Routeing guide they are CRS codes (in 2017). In the timetable information they are CRS codes (in 2018), and the file also has the OS grid reference as well as the name (uo to 26 characters) and TIPLOC. In 2012, the definition document for this file called them 3-Alpha codes! So less new than old-ish.
The fares feed has to deal with locations that are not NR stations, so its file uses additional codes. There is an internal unique identifier code (UIC), CRS, NLC, RESV (international reservation code), ERS (Eurostar), UTS (used on Underground ticket magnetic stripes), and then other coded location data (Administrative area - '70'=Britain, ERS country, county, PTE, zone, NLC for zone, UK region, ... and maybe I missed a few).
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