IS:speedSection

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Introduction

Speed limits are modelled in railML® using speedSection elements in combination with <speedProfile> elements.

  • Speed change in Kyritz (), Germany, Bahnkonzept, license ‒ with generous permission by the image creator
    Speed change in Kyritz (), Germany, Bahnkonzept, license ‒ with generous permission by the image creator

Documentation

Syntax

Autoexport from the XML-Schema for element IS:speedSection of railML® version 3.3
    
Description locates part of a track where given permanent speed restriction is applicable
Subschema infrastructure
Parents*

speeds

Children

name (0..*), isValid (0..*), areaLocation (0..*), linearLocation (0..*), spotLocation (0..*), gmlLocation (0..*), networkLocation (0..*), designator (0..*), typeDesignator (0..*), elementState (0..*), validForSpeedProfile (0..*)

Attributes:
  • endPointValidity: Indicates if the speed limit specified in the enclosing speed section is to be applied until the head of the train (no train delay) or the full train (train delay) has left the section. In ETCS this is usually refered to as Q_FRONT. By default a trainLengthDelay is assumed. (optional: EndPointValidity : xs:string: default: trainLengthDelay)
Possible values:
  • noTrainLengthDelay: The speed limit given in the enclosing speed section is to be applied until the front of the train has left the described section.
  • trainLengthDelay: The speed limit of the enclosing speed section is to be applied until the full train has left the section.,

  • isSignalized: indicates whether the speed aspect is shown next to the track by a signal or panel (true) or only in the "driver's timetable" (false) (optional: xs:boolean : xs:boolean),

  • isTemporary: boolean value to indicate whether the speed section is temporary (optional: xs:boolean : xs:boolean),

  • maxSpeed: maximum permitted speed in the speed section, in [km/h] (obligatory: tSpeedKmPerHour : xs:decimal),

  • id: the file-internal ID of the object (obligatory: tID : xs:ID): compare: Dev:Identities
*Notice:
Elements may have different parent elements. As a consequence they may be used in different contexts.
Please, consider this as well as a user of this Wiki as when developing this documentation further.
Aspects that are only relevant with respect to one of several parents should be explained exclusively in the documentation of the respective parent element.

 

Autoexport from the XML-Schema for element IS:speedSection of railML® version 3.2
    
Description locates part of a track where given permanent speed restriction is applicable
Subschema infrastructure
Parents*

speeds

Children

name (0..*), isValid (0..*), areaLocation (0..*), linearLocation (0..*), spotLocation (0..*), gmlLocations (0..*), networkLocation (0..*), designator (0..*), external (0..*), typeDesignator (0..*), validForSpeedProfile (0..*)

Attributes:
  • isSignalized: indicates whether the speed aspect is shown next to the track by a signal or panel (true) or only in the "driver's timetable" (false) (optional: xs:boolean : xs:boolean),

  • isTemporary: boolean value to indicate whether the speed section is temporary (optional: xs:boolean : xs:boolean),

  • maxSpeed: maximum permitted speed in the speed section, in [km/h] (optional: tVMax : xs:decimal)
Possible values:
  • end,

  • refersToTrain: Reference to the part of the train from where on the speed aspect is valid. Normally, a limiting speed signal aspect relates to the head of the train while a speed release refers to the end of the train. In ETCS this is usually refered to as Q_FRONT (optional: tTrainRelation : xs:string)
Possible values:
  • endOfTrain: The tail of the train should be located at the stopping place when the train has stopped.
  • headOfTrain: The headof the train should be located at the stopping place when the train has stopped. This is the default setting.
  • midOfTrain: The center of the train should be located at the stopping place when the train has stopped.,

  • id: the identifier of the object; this can be either of type xs:ID or UUID (obligatory: tID : xs:string: patterns: (urn:uuid: )?[0-9a-fA-F]{8}-[0-9a-fA-F]{4}-[0-9a-fA-F]{4}-[0-9a-fA-F]{4}-[0-9a-fA-F]{12}|\{[0-9a-fA-F]{8}-[0-9a-fA-F]{4}-[0-9a-fA-F]{4}-[0-9a-fA-F]{4}-[0-9a-fA-F]{12}\}): compare: Dev:Identities
*Notice:
Elements may have different parent elements. As a consequence they may be used in different contexts.
Please, consider this as well as a user of this Wiki as when developing this documentation further.
Aspects that are only relevant with respect to one of several parents should be explained exclusively in the documentation of the respective parent element.

 

Autoexport from the XML-Schema for element IS:speedSection of railML® version 3.1
    
Description This element is not documented in the schema!
Subschema infrastructure
Parents*

speeds

Children

name (0..*), isValid (0..*), areaLocation (0..*), linearLocation (0..*), spotLocation (0..*), gmlLocations (0..*), networkLocation (0..*), designator (0..*), external (0..*), validForSpeedProfile (0..*), any (0..*)

Attributes:
  • maxSpeed: maximum permitted speed in the speed section, in [km/h] (optional: tVMax : xs:decimal)
Possible values:
  • end,

  • isTemporary: boolean value to indicate whether the speed section is temporary (optional: xs:boolean : xs:boolean),

  • isSignalized: indicates whether the speed aspect is shown next to the track by a signal or panel (true) or only in the "driver's timetable" (false) (optional: xs:boolean : xs:boolean),

  • id: the identifier of the object; this can be either of type xs:ID or UUID (obligatory: tID : xs:ID: patterns: (urn:uuid: )?[0-9a-fA-F]{8}-[0-9a-fA-F]{4}-[0-9a-fA-F]{4}-[0-9a-fA-F]{4}-[0-9a-fA-F]{12}|\{[0-9a-fA-F]{8}-[0-9a-fA-F]{4}-[0-9a-fA-F]{4}-[0-9a-fA-F]{4}-[0-9a-fA-F]{12}\}): compare: Dev:Identities
*Notice:
Elements may have different parent elements. As a consequence they may be used in different contexts.
Please, consider this as well as a user of this Wiki as when developing this documentation further.
Aspects that are only relevant with respect to one of several parents should be explained exclusively in the documentation of the respective parent element.

 


Changes 3.1→3.2

There exists an overview of all changes between railML® 3.1 and railML® 3.2 on page Dev:Changes/3.2.

The element documentation has been changed.

The children have been changed.

The attributes have been changed.

Changes 3.2→3.3

There exists an overview of all changes between railML® 3.2 and railML® 3.3 on page Dev:Changes/3.3.

The children have been changed.

The attributes have been changed.

Semantics

Proposed Semantic Constraint "IS:020":
 
Each railML® <speedSection> element must reference (at least) one global defined railML® <speedProfile> element.

There is no ticket for this semantic constraint.


 
Proposed on 25 April 2022
xxx

Please, recognize our guidelines on semantic constraints 

Best Practice / Examples

A speed limit valid for a speed section is presented in railML® by a <speedSection> element. The <speedSection> element defines the start and end location of the speed section and the maximum speed limit valid for this section.

  • Example of a static speed profile for a railway track section
    Example of a static speed profile for a railway track section

The modelling in railML® is: 

<speedSection id="spsec100" maxSpeed="80" isTemporary="false" isSignalized="false" refersToTrain="endOfTrain">
	<name name="JNA-201" description="Speed section" language="EN"/>
	<linearLocation id="spsec100_lloc" applicationDirection="normal">
		<associatedNetElement netElementRef="ne_102" keepsOrientation="true">
			<linearCoordinateBegin positioningSystemRef="lps01" measure="11200.0"/>
			<linearCoordinateEnd positioningSystemRef="lps01" measure="11600.0"/>
		</associatedNetElement>
	</linearLocation>
	<validForSpeedProfile ref="ssp_basic"/>
</speedSection>

Each railML® <speedSection> element must reference (at least) one global defined railML® <speedProfile> element. A <speedProfile> element specifies a train type for which the speed limit given by a <speedSection> element shall be valid.

For example a <speedProfile> element can be used to provide for ETCS a Basic Static Speed Profile, a Specific Static Speed Profile (cant deficiency or brake type depending train categories, ETCS Operational Train categories or International Train Categories) or an Axle Load Speed Profile. For detailed information see <speedProfile>.

Example
<common id="co_01">
	<speedProfiles>
		<speedProfile id="ssp_Basic" isBasicSpeedProfile="true" mVersion="32">
			<name name="ETCS Basic SSP" description="Basic ETCS static speed profile used by trains for which no Specific SSP matches" language="EN"/>
		</speedProfile>
	</speedProfiles>
</common>

Upcomming

Additional Information

Notes

Additional Information

🗒️ This segment provides background information that is not relevant for the certification process.  


Modelling change @refersToTrain in railML3.2 to @endPointValidity in railML 3.3 was triggered by ticket #596.

Open Issues

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