Home » railML newsgroups » railML.infrastructure » Missing attributes in the element <switch>
Re: Missing attributes in the element <switch> [message #230 is a reply to message #229] Wed, 25 November 2009 19:46 Go to previous messageGo to previous message
Dr. Volker Knollmann is currently offline  Dr. Volker Knollmann
Messages: 17
Registered: September 2008
Junior Member
On 23/11/09 11:02, Martin Lehmann wrote:
> The element <switch> should have the attributes: "stationOcpRef" and
> "signalBoxOcpRef". The element <signal> supports these two attributes
> already. So why does not the element <switch>, too?

Hmmm... I think you've made a very good point here...

I guess there is definitely an inconsistency between signals and switches.

At a quick glance an easy solution would be to just add the attributes
as you proposed in your posting. Right.

But a closer look reveals some concerns:

* There is a possibility to map tracks to OCPs. This is done via
<trackRef> in the OCP's <propEquip>, IIRC. If implicitly all of the
track's elements are controlled by the linked OCP then we may NOT
ADD the attributes to <switch> but we must REMOVE them from <signal>
as they are redundant to the linking via <trackRef>.

* In case we accept the redundancy: are there any other (controlled)
elements that need a tuple of [station, signalBox] to be fully
specified? If yes, we should find a common data structure for this
and find a clean way to implement it. Adding those attributes one by
one to each element sequentially is NOT a good solution... ;-)

* What is planned for the Interlocking Sub-Schema? Isn't that a better
place to store the information? I currently don't know...

Right now I can't say what the best solution would be. Do you have any
ideas, Martin? This direct question is not meant to be a punishment for
showing some initiative and sending a query to the newsgroup! ;-)

I'd just like hear your (and of course other) opinion since you seem to
be currently working with that part of RailML.

Best regards,
Volker

--
Dr. Volker Knollmann
RailML Infrastructure Coordinator
EMail: coord(at)infrastructurerailmlorg


Business contact:

Siemens AG
Industry Sector
I MO RA SPP P5
Ackerstr. 22
38126 Braunschweig
Tel.: +49 (531) 226-2592
Mobile: +49 (173) 236 06 51
mailto:volkerknollmann(at)siemenscom

Report message to a moderator

[Message index]
 
Read Message
Read Message
Read Message
Previous Topic: Absolute poisitions in RC2
Next Topic: Radius for straight lines
Goto Forum:
  

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

Current Time: Sat May 18 19:06:39 CEST 2024