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This site is intended to collect the schema changes by topics, that influence the XML output. As it starts as a stub please refer to railML forum and SVN too.

railML schema changes since version 2

Between railML 2.0 and railML 2.1

Unfortunately no information available.

Between railML 2.1 and railML 2.2

Timetable subschema

To be filled.

Infrastructure subschema


Fact: The abbrevation attribute in the <ocp> element is declared deprecated.
Reason: There are multiple different abbreviations for single operation or control points. They can't be defined with one attribute.
Recommendation: Use the new <tsi> and/or <designator> elements instead.
Related Trac Tickets: #112
Related SVN Commits: [335], [439]
Old sample (railML 2.1):
<ocp ... name="Passau Hbf." abbrevation="NPA"/>
New sample (railML 2.2):
<ocp ... name='Passau Hbf.' ...>
  <tsi country="80"/>
  <designator register='RL100' entry='NPA'/>
  <designator register='ENEE' entry='80-26506-6'/>
  <designator register='IBNR' entry='8000298'/>
  <designator register='DB640' entry='Pa'/>

Rollingstock subschema

Common subschema

Between railML 2.2 and railML 2.3

Timetable subschema

Infrastructure subschema

trainRadio, trainRadioChange

Fact: The <trainRadio> element and <trainRadioChange> element have been introduced.
Recommendation: Use the new <trainRadio> and <trainRadioChange> elements for defining conditions describing the train radio conditions along the track.
Related Trac Tickets: #43
Related SVN Commits: [630]
ocs element sample:
    <trainRadioChange id="trc01" pos="57.46" dir="up" radioSystem="GSM-R" broadcastCalls="true">
infra attributes sample:
  <infraAttributes id="ia01">
    <trainRadio radioSystem="GSM-R" broadcastCalls="true" />


Fact: The parameter vMax in the <speedChange> element has been modified so that it can also handle the value "end".
Recommendation: Use the new value "end" in order to mark the end of a temporary speed restriction.
Related Trac Tickets: #97
Related SVN Commits: [609]
<speedChange id="sc7" pos="256.7" vMax="end" dir="up" />


Fact: A new attribute named geometryElementDescription has been added to the <radiusChange> element. It is an enumeration parameter, which provides the following entries that enable a more detailed description of transition curves:
  • TS_cubicParabola
  • TS_parabola4
  • TS_clothoide; the usually used transition curve in modern railways, see English Wikipedia and German Wikipedia description
  • TS_WienerBogen; a special transition curve used in Austria and Germany, see German Wikipedia description
  • TS_BlossBogen; a special transition curve widely in Germany, see German Wikipedia description
  • TS_Sinusoide
  • TS_Cosinusoide
  • SC
  • (any other)
Reason: So far, it was not possible to model transition curves in railML although they represent a basic track alignment feature.
Recommendation: Use the new geometryElementDescription attribute in the <radiusChange> element for modelling the begin and end points of transition curves.
Related Trac Tickets: #251
Related SVN Commits: [616]
sample for transition curve begin:
<radiusChange ... geometryElementDescription='TS_clothoide' />
sample for transition curve end:
<radiusChange ... geometryElementDescription='SC' />


Fact: The element <tsi> has been marked deprecated.
Reason: Elements dedicated for the usage in conjunction with TAP TSI shall be replaced by a more generic approach.
Recommendation: Instead of the element <tsi>, please use the <designator> element with the new register entry "PLC" (Primary Location Code) for referencing a TAF TSI relevant name of an operational control point.
Related Trac Tickets: #252
Related SVN Commits: [611]
old sample (railML 2.2):
new sample (railML 2.3):


Fact: The optional attribut lineCategory has been added to the parameters of the element <line>.
Reason: The European standard EN 15528 defines several line categories for classification of railway lines depending on allowed maximum axle load and meterload paramters.
Recommendation: Use the new paramter lineCategory within the element <line> to define a line category according to EN 15528. The following values are possible:
  • A
  • B1, B2
  • C2, C3, C4
  • D2, D3, D4, D4xL
  • E4, E5
  • (any other)
Related Trac Tickets: #259
Related SVN Commits: [620], [621], [622]
<line ... lineCategory='E4' />


Fact: Although being optional, the attribut xml:lang should always be given in the <additionalName> element.
Reason: In order to being able to correctly read the given additional name e.g. for an OCP, it is necessary to know in which language the additional name has been written.
Recommendation: Always use the optional paramter xml:lang when using the element <additionalName>.
Related Trac Tickets: #263
Related SVN Commits: [629]
<ocp id="ocp_ΑΘΗΝ" name="ΑΘΗΝΑ">
  <additionalName name="Ἀθῆναι" xml:lang="grc"/>
  <additionalName name="ΑΘΗΝΑ" xml:lang="el-Grek"/>
  <additionalName name="ATHINA" xml:lang="el-Latn"/>
  <additionalName name="Athens" xml:lang="en"/>
  <additionalName name="Athen" xml:lang="de"/>
  <additionalName name="Athènes" xml:lang="fr"/>


Fact: New optional element crossedElement has been added for the elements levelCrossing, bridge and tunnel.
Reason: This implementation allows to model more specific information about natural and infrastructure landmarks that are crossed by a river, a railway line or a street.
Recommendation: If you want to define information about a natural or infrastructure landmark that you are going to cross with your track, please use the new element <crossedElement>.
Related Trac Tickets: #271
Related SVN Commits: [629]
sample for bridge:
<bridge id="br01" name="Marienbrücke" pos="2050">
    <crossedElement type="highway:cycleway" id="cw01" name="Elberadweg" pos="2200" />
    <crossedElement type="highway:road" id="rd01" name="B6" pos="2150" />
    <crossedElement type="natural:river" id="ri01" name="Elbe" pos="2100" />

Rollingstock subschema

Common subschema