IS:connection crossing
connection
Scheme description / Schemenbeschreibung
Position of connection in the XML-Tree / Position von connection im XML-Baum
- Parent: <crossing>
- Children: Not yet described. / Noch nicht beschrieben.
Multiplicity / Anzahl
Semantics / Bedeutung
The <connection> describes a branch of the <crossing>, including which other track this branch is connected to. See Dev:Connection between tracks for more details on different connections between tracks.
Attributes of connection / Attribute von connection
- 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. - ref: This refers to the id attribute of the associated <connection> element.
- orientation: Orientation of the <crossing> branch relative to the direction of the <track> (looking towards the <trackEnd>).
- incoming: This branch is merging into the track, tracks are converging relative to the direction.
- outgoing: Twis branch is splitting out from the track, tracks are diverging relative to the direction.
- rightAngled: This branch is crossing perpendicular to the track. Only meaningful for <crossing>, not for <switch>.
- unknown: The direction is not known.
- other:anything: Any value that does not fit any value from the previous enumeration list, fulfilling the constraint: at minimum two characters, whitespace is not allowed. Please, apply Dev:usingAny accordingly.
- course: Sideways direction of this branch relative to the continuation of the <track> in the track's direction (looking towards the <trackEnd>).
- straight This branch continues straight. This assumes the principal track is not considered straight (<switch>@trackContinueCourse is not "straight").
- left: This branch is merging from the left or is diverging leftward from the track.
- right: This branch is merging from the right or is diverging rightward from the track.
- other:anything: Any value that does not fit any value from the previous enumeration list, fulfilling the constraint: at minimum two characters, whitespace is not allowed. Please, apply Dev:usingAny accordingly.
- radius: Radius of the curve with which the branch rails converge into or diverge from the track, measured from an imaginary center of a circle. Defined in the same way as <radiusChange>@value.
- maxSpeed: Speed restriction for passing over the switch on this branch.
- passable Denotes if you can pass between the track the <connection> is placed on and the track referred to by ref. See Dev:Connection_between_tracks for descriptions of the usage.
- branchDist (deprecated with version 2.1) Since originally no separate, connecting track element was allowed, a special attribute denoted the length of the connection. See Dev:Connection_between_tracks.
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 (_) - ref: tGenericRef (xs:IDREF); required
Must point to the id of another <connection> - orientation: tConnectionOrientation (FIXME); required
- course: tCourse (Restriction of xs:string; can be "straight"/"left"/"right" or any); optional
- radius: tRadiusM (xs:decimal, 6 fraction digits, radius value measured in meter); optional (introduced with version 2.4)
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- maxSpeed: tSpeedKmPerHour (xs:decimal, 5 digits and 1 fraction digit with minimum value 0, speed value measured in km/h); optional
- passable: xs:boolean; default: TRUE; optional
- branchDist: tLengthM (xs:decimal, 6 fraction digits, length value measured in meter); optional
Best practice & Examples / Empfohlene Anwendung & Beispiele
As the movement possibilities are given for a fully functional <switch> (true), a simple <crossing> (false and false) and a double switch crossing (true and true; within railML® a crossing with @type=doubleSwitchCrossing) the passable does not need to be defined for these element types. For fully functional switches/crossings only use @passable for each of the IS:crossing connection of a crossing@type="simpleSwitchCrossing" (single slip switch) with either the value combination true and false or false and true.
When setting a switch/crossing into a reduced state in railML
When you pad(lock) a switch/switch crossing use the combination of state@disabled=true and passable=true/false under the switch/crossing element. The passable for passing over the switch/crossing on the track the switch is placed on (the principal/straight track) is implicit given through the @passable=true/false of the switch connection (the diverging track).
Notes / Anmerkungen
None.
Open issues / Offene Punkte/Pendenzen
Not yet described. / Noch nicht beschrieben.