Revision as of 14:39, 24 January 2016 by Jörg Lingen (talk | contribs) (Rollingstock subschema)
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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='PLC' entry='DE18274'/>
  <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):
<ocp ... name='Buchs (SG)' ...>
  <tsi country='85' location='09404' check='' />
new sample (railML 2.3):
<ocp ... name='Buchs (SG)' ...>
  <designator register='PLC' entry='CH9404' />


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


Fact: The vehicleIdentification element in the <operator> was introduced for storing UIC numbers.
Reason: The UIC has developed two variants for unique identification numbers of vehicles, i.e. locomotives and wagons. Both types consists of 12 digits. As the identification encodes also the vehicle owner/operator it was included as part of the <operator> element to have a clear relation to validity period.
Recommendation: Use the new <vehicleIdentification> element for each <operator> element defined for the particular vehicle.
Related SVN Commits: [643]
New sample (railML 2.3):
<operator ...>
  <vehicleIdentification uicIdentNumber='978081940527' countryCode='D' vehicleKeeperMarking='LEG' />


Fact: The trainClearanceGauge element in the <wagon> was introduced for storing the vehicle clearance gauge(s) in a unified way.
Reason: There are several clearance gauges for railway vehicles defined in national or international regulations and standards. They are taken from the prepared code list to be comparable with similar data of a railway line.
Recommendation: The use of the new <trainClearanceGauge> shall only take elements out of the given list TrainClearanceGauges.xml.
Related Trac Tickets: #3
Related SVN Commits: [627], [623]
New sample (railML 2.3):
<wagon ...>
  <trainClearanceGauge code='GC' />
  <trainClearanceGauge code='DE2' />


Fact: The maintenanceIntervals element in the <vehicle> was introduced for storing individual maintenance intervals of railway vehicles.
Reason: For the asset management of railway vehicles it shall be possible to store individual maintenance intervals with the vehicle data.
Related Trac Tickets: #77
Related SVN Commits: [624]
New sample (railML 2.3):
<vehicle ...>
    <maintenanceInterval id='RSMI1' name='R1' maximumIntervalDays='365' maximumIntervalDistance='20000'/>
    <maintenanceInterval id='RSMI2' name='S1' maximumIntervalDays='730' maximumIntervalDistance='50000'/>

Common subschema