Home » railML newsgroups » railml.timetable » Timetable updates
Re: Timetable updates [message #574 is a reply to message #573] Tue, 13 April 2004 17:26 Go to previous messageGo to previous message
tobias is currently offline  tobias
Messages: 8
Registered: April 2005
Junior Member
Thomas Kauer wrote:

> In respect to possible future use of the timetable-schema as an interface
> for programs that treat with actual trains and not only with longtime
> planning it should support the possibility to give delta-informations for
> existing timetable data. So it would be useful to add the proposed
> attribute <status>.
> The <date> of the last change would be used in this respect to decide for
> multiple changes which one is the last, that is to say which one is valid.


An example where one would definitely need delta-information is a
day-of-operation system for railway companies. In such a system there
would be several updates per second.

It has to be asked if the <status> attribute is adequate for indicating
changes. It could be if there existed some identity for each train, but an
artificial identity (like train number + date) is not enough. For example,
how would I send the information that train number 4711 is now called
4712?



> Joachim Rubröder wrote:

>> This case is not especially treated in the schema. But you are free to
>> put a whole big timetable with thousand trains in a file, or to send
>> just a few update-trains. I think this is a task for the receiving
>> program to identify the trains as new or known ones.

>> There is the <date> attribute in <train> which could be used as date of
>> the last change and I thought about adding another optional attribute
>> <status> in the <train> element (as used within SBB) wich could have
>> values like "new", "changed", "omitted", ...
>> Would this be helpful?

>> Joachim Rubröder

>> Tobias Bende schrieb:
>>> I have a question on updates of existing timetables. Given that a file
>>> with a complete timetable (especially in a format like RailML) is very
>>> large it is in practice often desirable to be able to send updates when
>>> something changes as opposed to recreate and send the entire file. Is
this
>>> something that has been considered?
>>>
>>> Tobias Bende
>>>
>>>

Report message to a moderator

[Message index]
 
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Previous Topic: Daylight saving time
Next Topic: [Proposal]
Goto Forum:
  

[ Syndicate this forum (XML) ] [ RSS ] [ PDF ]

Current Time: Sat Apr 20 07:47:58 CEST 2024