IS:trackCircuitBorder: Difference between revisions
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{{ | * {{Attr|id}} {{Intro|2.0}}: This is the unique identifier which is used to refer to the current element. It is used for XML file internal unambiguous references. [[CO:identities|How to handle it?]] {{AddAnn|| }} | ||
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* {{Attr|code}} {{Intro|2.1}}: This is a short string for typical, specific abbreviations, used in different systems with the same understanding. {{AddAnn|| }} | * {{Attr|code}} {{Intro|2.1}}: This is a short string for typical, specific abbreviations, used in different systems with the same understanding. {{AddAnn|| }} |
Revision as of 15:03, 12 January 2017
trackCircuitBorder
Scheme description / Schemenbeschreibung
Position of trackCircuitBorder in the XML-Tree / Position von trackCircuitBorder im XML-Baum
- Parent: <trainDetectionElements>
- Children: <additionalName> (introduced with version 2.1), <geoCoord>, <states>
Multiplicity / Anzahl
Semantics / Bedeutung
A <trackCircuitBorder> allows for defining insulated rail joints.
Attributes of trackCircuitBorder / Attribute von trackCircuitBorder
- id (introduced with version 2.0): This is the unique identifier which is used to refer to the current element. It is used for XML file internal unambiguous references. How to handle it?
- code (introduced with version 2.1): This is a short string for typical, specific abbreviations, used in different systems with the same understanding.
- name (introduced with version 2.0): This is a short name for the current item.
- description (introduced with version 2.0): 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.
- 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.
- xs:anyAttribute: This provides an extension point for non-railML® attributes in a foreign namespace. How to use it?
- 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.
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- absPos: This is the position on a track as absolute mileage/chainage.
Das ist die Position des Elements im Referenzsystem der Strecken-Kilometrierung.
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- 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 <trackCircuitBorder> along the track. Possible values are:
- none: <trackCircuitBorder> 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: <trackCircuitBorder> is valid in both directions.
- unknown: <trackCircuitBorder> is restricted to a certain direction, but this direction is not known.
- ocpStationRef: This refers to the id attribute of the associated <ocp> element.
(introduced with version 2.1)
- controllerRef: This refers to the id attribute of the associated <controller> element.
(introduced with version 2.1)
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 more constrained direction statements: enumeration up, down, unknown; derived from tLaxDirection; optional
- ocpStationRef xs:IDREF, optional
- controllerRef xs:IDREF, optional
Best practice & Examples / Empfohlene Anwendung & Beispiele
Not yet described. / Noch nicht beschrieben.
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.