View source for Dev:Border between infrastructure managers and countries

== Introduction ==

Border between infrastructure managers (handover point) is the point where legal responsibility changes between the infrastructure managers (IM) [TAF TAP TSI]<ref>{{external|http://taf-jsg.info/wp-content/uploads/2023/07/20230426-JGS-Handbook-3.3-with-XSD-3.3.0.0.pdf|TAP TSI and TAF TSI Sector Handbook for the Communication between Railway Undertakings and Infrastructure Managers (RU/IM Telematics Sector Handbook) Submitted on 20th October 2022}}</ref>.

These IM borders can be found between countries and within one e.g. in case there are private and national railway infrastructure managers in a country. Sometimes there two railway lines meet each other. Therefore below you can see two examples:
* border between lines and border between IMs coincide;
* border between IMs is within one line.

== Borders between IMs and railway lines coincide ==

The photo shows an example of a ‘handover point’ between Germany and Austria, IMs {{wikipedia|1=DB InfraGO|3=de}} in Germany and {{wikipedia|ÖBB Infra}} in Austria. Here also two railway lines meet each other - "Bahnstrecke München Ost Pbf – Simbach (Inn) (DB-Grenze)" and "Bahnstrecke Neumarkt-Kallham – Staatsgrenze nächst Braunau am Inn".

In the source code, shown below, there are two tracks. When choosing approach with two tracks be aware of semantic constraints e.g. IS:003 "If two {{tag|IS|track}}s are connected, the @absPos values of the connected {{tag|IS|trackBegin}} and {{tag|IS|trackEnd}} must be identical" <ref name="semCon">[[Dev:Semantic_Constraints]]</ref>. Here exception to restriction IS:003<ref name="semCon"></ref> applies because tracks belong to different mileage systems. In code this justification is represented via two railway lines referring to tracks.

Ownership is represented by @infrastructureManagerRef of {{tag|IS|line}} elements. Further information about IMs is given in the {{tag|CO|infrastructureManager}} element and the corresponding [[Dev:InfrastructureManagers|code list]]. 

[[File:Grenzbrücke_Braunau_Simbach.jpg|thumb|Border between infrastructure managers {{wikipedia|ÖBB Infra}} in Austria and {{wikipedia|1=DB InfraGO|3=de}} in Germany ({{external|https://commons.wikimedia.org/wiki/User:Renardo_la_vulpo|By Renardo la vulpo|mode=silent}}/{{external|https://commons.wikimedia.org/wiki/File:Braunau_a_I,_Eisenbahnbr%C3%BCcke_nach_Simbach,_2.jpeg|Image source|mode=silent}}/{{external|https://creativecommons.org/public-domain/cc0/|CC0|mode=silent}})]]

<syntaxhighlight lang="xml">
<metadata>
  <organizationalUnits>
    <infrastructureManager id="ima01" code="DBN"/>
    <infrastructureManager id="ima02" code="ÖBB"/>
  </organizationalUnits>
</metadata>
..
<track id="tr01">
  <trackTopology>
    <trackBegin id="tb01" pos="0" absPos="0">..</trackBegin>
    <trackEnd id="te01" pos="115087" absPos="115087">..</trackEnd>
  </trackTopology>
  <trackElements>
    ..
</track>
<track id="tr02">
  <trackTopology>
    <trackBegin id="tb02" pos="0" absPos="59229">..</trackBegin>
    <trackEnd id="te02" pos="59220" absPos="9">..</trackEnd>
  </trackTopology>
..
</track>

<trackGroups>
  <line id="lin01" code="5600" infrastructureManagerRef="ima01" name="Bahnstrecke München Ost Pbf – Simbach (Inn) (DB-Grenze)">
    <trackRef ref="tr01"/>
  </line>
  <line id="lin02" code="20701" infrastructureManagerRef="ima02" name="Bahnstrecke Neumarkt-Kallham – Staatsgrenze nächst Braunau am Inn">
    <trackRef ref="tr02"/>
  </line>
</trackGroups>
</syntaxhighlight>

== Border between IMs is within one railway line ==

The photo shows an example of a ‘handover point’ at the Germany-Czech Republic border on {{wikipedia|Děčín–Dresden-Neustadt_railway}}. This line is operated by two different rail operating companies, {{wikipedia|Správa_železnic}} in the Czech Republic and {{wikipedia|1=DB InfraGO|3=de}} in Germany, meaning there is a change in infrastructure managers. Mileage of the border was obtained from Variabler Infrastruktur Aggregator<ref>{{external|1=https://via.bahnkonzept.de/index.php?srs=6240&dbi=1101&fti=11110000&vsi=010|2=Variabler Infrastruktur Aggregator|mode=silent}}</ref>.

In the source code, shown below, there is one track. Ownership is represented by {{tag|IS|ownerChange}} elements. Further information about IMs is given in the {{tag|CO|infrastructureManager}} element and in the corresponding [[Dev:InfrastructureManagers|code list]]. 
{{anchor|Falk2}}
[[File:2023-11-29 railML handoverPoint.jpg|thumb|Border between infrastructure managers {{wikipedia|Správa_železnic}} in the Czech Republic and {{wikipedia|1=DB InfraGO|3=de}} in Germany {{proprietary|https://w.wiki/Dq4y|Falk2|https://w.wiki/Dq4z|thanks=With generous permission by the image creator}}]]

<syntaxhighlight lang="xml">
<metadata>
  <organizationalUnits>
    <infrastructureManager id="ima01" code="DBN"/>
    <infrastructureManager id="ima02" code="SZD"/>
  </organizationalUnits>
</metadata>
..
<track id="tr01">
  <trackTopology>
    <trackBegin id="tb01" pos="0" absPos="0">..</trackBegin>
    <trackEnd id="te01" pos="65986" absPos="65986">..</trackEnd>
  </trackTopology>
  <trackElements>
    ..
    <ownerChange id="och01" pos="0" absPos="0" infrastructureManagerRef="ima01"/>
    <ownerChange id="och02" pos="11859" absPos="11859" infrastructureManagerRef="ima02" name="Bahnverw.grenze Bad Schandau Gr"/>
    ..
  </trackElements>
</track>
</syntaxhighlight>

== References ==