User:RailML Coord Documentation/IS:platformEdge

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platformEdge
 


Schema description / Schemenbeschreibung

Position of platformEdge in the XML-Tree / Position von platformEdge im XML-Baum

Multiplicity / Anzahl

[0..∞]

Semantics / Bedeutung

A <platformEdge> defines the border line between platform and railway track, where passengers are meant to board and un-board the train. A platform edge is always connected with exactly one railway track.

Attributes of platformEdge / Attribute von platformEdge

  • 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 fßr die spätere interne Referenzierung dieses Elements erforderlich ist. Fßr eine detaillierte Erklärung siehe Dev:identities.
  • code (introduced with version 2.1): Machine-interpretable string (e.g. an abbreviation) used for identification of the object across exchange partners, usecase specific uniqueness constraints may apply. Please see our description of the differences between id, code and human-readable identifiers.
    Maschineninterpretierbare Zeichenkette (z.B. Abkßrzung), die zur Identifizierung des Objekts auch bei Austauschpartnern verwendet wird, wobei spezifische Eindeutigkeitsbeschränkungen gelten kÜnnen. Bitte beachten Sie unsere Erläuterung zu den Unterschieden zwischen id, code and menschenlesbaren Kennzeichnungen.
  • name: Established, human-readable short string, giving the object a name. Not intended for machine interpretation, please see our notice on human interpretable data fields.
    Etablierte, menschenlesbare kurze Zeichenkette, die das Objekt benennt. Nicht zur maschinellen Interpretation bestimmt, siehe Hinweise zu menschenlesbaren Datenfeldern.
  • description: Human-readable, more detailed description as addition to the name. It should give additional explanations or hints to the contents of this element. Not intended for machine interpretation, please see our notice on human interpretable data fields.
    Menschenlesbare, detailliertere Beschreibung als Ergänzung zu name. Sie soll zusätzliche Erläuterungen oder Hinweise auf den Inhalt dieses Elements geben. Nicht zur maschinellen Interpretation bestimmt, siehe Hinweise zu menschenlesbaren Datenfeldern.
  • 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 defines the language used for name and description. Use Template:Ra:Tag to provide a name and/or description in other languages.
  • 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.
🗒️ 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.
🗒️ 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: (deprecated with version 2.5) This defines the validity of <platformEdge> along the track. Possible values are:
  • none: <platformEdge> 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: <platformEdge> is valid in both directions.
  • unknown: <platformEdge> is restricted to a certain direction, but this direction is not known.
  • ocpRef Reference from a platform edge to an OCP, to which this platform edge belongs.
  • length The length of the platform edge is given in meters. The attribute shall be used to define the physical length of the platform edge.
  • height The height of the platform edge is given in millimeters. Typical values being used e.g. in Germany and many European countries are 550 and 760 millimeters (see https://en.wikipedia.org/wiki/Railway_platform_height (external link)).
  • side The side of the railway track (related to its positive orientation), where the platform edge is located. Possible values are left and right.
  • parentPlatformEdgeRef Reference from a platform edge to another platform edge. This concept can be used to model different sections of a platform edge, e.g. with different heights. It can be also used to model an operationally usable platform edge as part of a physical platform edge.

Syntactic Constraints / Syntaktische Beschränkungen

  • 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 (_)
  • code: xs:string, optional
  • name: xs:string, optional
  • description: xs:string, optional
  • xml:lang: xs:language, language identification, optional
  • 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: tLengthM (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
  • length: xs:decimal, 6 fraction digits, length value measured in meter
  • height: xs:decimal, 6 fraction digits, length value measured in millimeter
  • side: Restriction of xs:string (enumeration)
  • ocpRef: xs:IDREF
  • parentPlatformEdgeRef: xs:IDREF

Best practice & Examples / Empfohlene Anwendung & Beispiele

Consider railMLÂŽ 2.3 example of Middle Rhine Railway by GPSinfradat (link to the railMLÂŽ website).

This code example defines a platform of the Middle Rhine Railway. 

<platformEdges>
  <platformEdge id="pe263010" dir="up" pos="0" absPos="91104" length="172" ocpRef="ocpKKO">
    <geoCoord coord="50.351974 7.589237" epsgCode="urn:ogc:def:crs:EPSG::4326" extraHeight="75" heightEpsgCode="urn:ogc:def:crs:EPSG::5783"/>
  </platformEdge>
…
</platformEdges>

Notes / Anmerkungen

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/Pendenzen

Not yet described. / Noch nicht beschrieben.

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