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RailML semantics, nextdeparture, recurringschedule [message #723] Fri, 06 May 2011 09:02 Go to previous message
tuomas.tiihonen is currently offline  tuomas.tiihonen
Messages: 15
Registered: May 2011
Junior Member
Greetings to RailML community!

This is my first post to the forum so I will start with a introduction. I
am a Software Design Engineer with strong Java/C++ programming/design
background. I am currently working for Finnish company called Mitron Oy.
We have headquarters in Forssa/Finland and other offices in
Tampere/Finland, Mittenaar/Germany and Warszawa/Poland. Mitron focuses on
passenger information, display, entertainment, announcement and security
systems for trains, trams, subways, stops, stations and platforms. More
information about company can be found from www.mitron.com and I am happy
to answer further queries about me or the company.

Within Mitron we have ongoing discussion about RailML and I have now been
studying it from technical perspective. Goal of this study is to make
decision about our commitment to RailML and what our role would be.

During this technical investigation I have had some difficulties related
to the semantic specification explained (or more accurately not explained)
in the RailML wiki pages.

I have so many questions about the semantics, but I have to start from
somewhere so here it goes:

We have thing called "Departure" which I think is close to
timetable->trains->train in RailML. Our departure knows route and
timetable for the route for example. Departure knows also list of possible
next Departures that might come next from the terminal station of first
departure. What would be the place in RailML to get that information? Is
the circulations/rostering/blocks semantically identical to this? Does the
block mean part of train or part of track as an example? I have tried to
figure out the semantical relations of those mentioned RailML elements,
but without documentation in wiki it has proved difficult.

Other thing I don't quite get, even though it is mentioned in wiki is
relation between operatingpediod->operatingday->operatingcode->bitmask and
operatingperiod->bitmask and operatingdaydeviance and holiday and
specialservice. Which one overrides which? Why there are period bitmask
separately from week bitmask and then deviances and holidays?

What is ocpTT->sectionTT->distance. Distance from where to where? Is this
in relation to infrasructures
track->tracktopology->trackBegin/trackEnd->pos -attribute? If I would like
to know distance of two stations along the track/line what is the correct
place?

With Kindest Regards,
Mr. Tuomas Tiihonen

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