| [railML3] Request for extension of the 'crossing' infrastructure element [message #2440] |
Sun, 17 May 2020 15:18  |
Heidrun Jost
Messages: 25
Registered: September 2006
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Junior Member |
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Hello,
I am working on a Thales railway infrastructure project for Norway. An important topic is the mapping of the infrastructure by using railML v3.1. When modelling the railway network (on the Micro Layer), we have a problem with the crossing element of railML. In my view the element 'crossing' (xsd:type rail3:Crossing) should be expanded in its definition. I miss the possibility of referencing to 'netRelation' (rail3:NetRelation) from this element. What I mean can be shown well using the example of the definition of a double slip in railML v3.1. In contrast to a crossing, this very similar infrastructure element supports referencing to 'netRelation'.
Simplified example of a double slip by railML v3.1
<switchIS id="Dhk3FD1ZZsZZfKdMmH8xO7V9" type="doubleSwitchCrossing" >
<name name="KAM 2" language="en" />
<spotLocation id="spotlocationId"
netElementRef="Z3GkdhHfEBn3Xvh6bZZpx2V9" intrinsicCoord="0"/>
<straightBranch netRelationRef="VyATIZHrOBtcgXQ7DBI5Cfa"/>
<straightBranch netRelationRef="Z3q46YPEowm4bZHzS4G2Ysl8"/>
<turningBranch netRelationRef="Z0C40llZZSEq6eSXY9sakbU8"/>
<turningBranch netRelationRef="iEkqg5X8LFb8Opwn0KNYmb"/>
</switchIS>
Argumentation:
- A crossing can be considered topologically as a simplified switch crossing.
- From the safety perspective of interlockings, the branching, merging and crossing of tracks must be modelled in the form of a netRelation. Precisely these structures in the network are to be protected by interlocking measures. The 'natural' identification of such a structure occurs via the topology.
- From my perspective, railML v3.1 offers two levels of abstraction for mapping the railway network. Each layer has its own root element/ type.
a. a 'graph layer' represented by the 'topology' element (rail3:Topology)
b. an element oriented 'infrastructure layer' represented by
'functionalInfrastructure' element (rail3:functionalInfrastructure)
The linking from the 'infrastructure' layer to the 'graph layer' must be supported when it comes to elementary properties, such as crossing of tracks.
Mit freundlichen Grüßen/Best regards
--
Heidrun Jost
Data Manager
Transportation Systems
Thales Deutschland GmbH
Phone: +49 (0) 30 688306 423
Schützenstr. 25 10117 Berlin Germany
[Updated on: Mon, 25 May 2020 15:30] by Moderator Report message to a moderator |
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