IS:derailer

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derailer
 


Scheme description / Schemenbeschreibung / Description du schéma

Position of derailer in the XML-Tree / Position von derailer im XML-Baum / position de derailer dans l’aborescence XML

Multiplicity / Anzahl / Multiplicité

[0..∞]

Semantics / Bedeutung / Sémantique

A <derailer> is a device used to prevent fouling of a rail track by unauthorized movements of trains or unattended rolling stock. It works (as the name suggests) by derailing the equipment as it rolls over or through the derail. http://en.wikipedia.org/wiki/Derail (external link)

Attributes of derailer / Attribute von derailer / Attributs de derailer

  • id: XML-file-wide unique, machine-interpretable identity, required for later referencing that element internally. For a detailed explanation see Dev:identities.
    XML-Datei-weit eindeutige, maschineninterpretierbare Identität, die für die spätere interne Referenzierung dieses Elements erforderlich ist. Für eine detaillierte Erklärung siehe Dev:identities.
  • code (introduced with version 2.1): This is a short string for typical, specific abbreviations, used in different systems with the same understanding.
  • name: This is a short name for the current item.
  • description: This is a more detailed description as addition to the short name. It shall allow a short overview or hints to the contents of this data set.
Birne.png Please take into account our references to human-intepretable data fields.

Bitte berücksichtigen Sie unsere Hinweise zu menschen-intepretierbaren Datenfeldern.

Veuillez tenir compte de nos références aux champs de données à valeur humaine.

  • xml:lang (introduced with version 2.1): This is a unique identifier of language. It uses basically the language standard IETF BCP 47 (external link) which may be different to ISO 639-1 (external link) or ISO 639-2 (external link). For mapping hints see relation to other standards (external link).
    This is used for defining name and description.
  • pos: This is the position on a track defined as distance from its start (trackBegin) regardless the "absolute mileage" in @absPos.
    Das ist die Position des Elements auf einem Track i.S. der realen Entfernung zum trackBegin. Sie ist damit unabhängig von der mit absPos modellierten Strecken-Kilometrierung.
Note.png For an explanation of the differences between @pos and @absPos see <mileageChange>
  • absPos: This is the position on a track as absolute mileage/chainage.
    Das ist die Position des Elements im Referenzsystem der Strecken-Kilometrierung.
Note.png For an explanation of the differences between @pos and @absPos see <mileageChange>
  • absPosOffset (deprecated with version 2.1): The semantics of this attribute aren't very clear. It seems to be redundant to the definitions with mileageChanges in "overlapping regions".
  • dir: This defines the validity of <derailer> along the track. Possible values are:
  • none: <derailer> has no direction restriction.
  • up: This denotes the direction from the <trackBegin> to the <trackEnd> (increasing relative position values).
  • down: This goes opposite to up (decreasing relative position values).
  • both: <derailer> is valid in both directions.
  • unknown: <derailer> is restricted to a certain direction, but this direction is not known.
  • ruleCode: Code for this element in the rule book, combination of letters and numbers and space allowed, e.g. Ne5, GA, SFRS/E
  • derailSide: Side, to which the vehicle will be derailed (left or right) considering the orientation of the track.
  • kind: kind of derail device (cp. book "Railway Signalling and Interlocking" by Gregor Theeg and Sergej Vlasenko (Editors), p. 155)
  • model: specification of the derailer

Syntactic Constraints / Syntaktische Beschränkungen / Contraintes syntactiques

  • id: xs:ID, required
    a string, starting with a letter (a..zA..Z) or an underscore (_),
    followed by a non-colonized and non-spaced string consisting of letters, digits, points (.), dashes (-) or underscores (_)


  • pos: tLengthM (xs:decimal, 6 fraction digits, length value measured in meter); required; must be greater than or equal to zero, less than or equal to the track's length
  • absPos: xs:decimal, 6 fraction digits, length value measured in meter; optional
  • absPosOffset: xs:decimal, 6 fraction digits, length value measured in meter; optional
  • dir: xs:string, generic type for direction statements: enumeration up, down, unknown, none, both; optional
  • ruleCode: xs:string
  • derailSide optional
  • kind optional

Best practice & Examples / Empfohlene Anwendung & Beispiele / Bonnes pratiques & exemples

Not yet described. / Noch nicht beschrieben. / Pas encore décrit.

Notes / Anmerkungen / Notes

General information on positioning

Positive pos values describe the distance from the track's begin. The track length is derived from the pos value in <trackEnd>.

The absolute mileage refered to by absPos is usually found on technical drawings of the track layout or on mileage posts next to the track.

Open issues / Offene Punkte/Pedenzen / Questions ouvertes

Not yet described. / Noch nicht beschrieben. / Pas encore décrit.