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<speedChangeGroup> [message #149] Tue, 15 March 2005 18:54
Matthias Hengartner is currently offline  Matthias Hengartner
Messages: 57
Registered: August 2003
Member
Hello,

as I mentioned last wednesday at the railML-meeting, I have a suggestion
concerning the <speedChange>-Element.

When there is a speed change on a track, it concerns oftentimes not only one
but several train categories. In my opinion, it would be much more practical
to combine them. I imagine something similar to the
<signalGroup>/<baliseGroup>-elements. The main difference is, that we have
the base track element attributes (position, ID, dir, etc.) in the
"group-element" (let's call it <speedChangeGroup>), and the
<speedChange>-specific attributes (particularly vMax and trainCategory) in
the "member-element" (<aSpeedChange>).

I think best way to illustrate is an example:

<speedChangeGroup elemID="SC009" pos="12.039" absPos="46.132" dir="up">
<aSpeedChange vMax="90" trainCategory="R"/>
<aSpeedChange vMax="135" trainCategory="A"/>
<aSpeedChange vMax="160" trainCategory="D"/>
<aSpeedChange vMax="200" trainCategory="N"/>
</speedChangeGroup>

I hope we'd find better names than <speedChangeGroup> and <aSpeedChange> for
this. Any ideas?
And another open point is the placing of the attribute "status".


What do you think about this?


Best regards
Matthias Hengartner



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Matthias Hengartner
IVT ETH Zürich
hengartner(at)ivtbaugethzch
++ 41 1 633 68 16
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