TT:trackRef

trackRef
 

Scheme description / Schemenbeschreibung

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

• Parent: <sectionTT>
• Children: Not yet described. / Noch nicht beschrieben.

Multiplicity / Anzahl

[1..1]

Semantics / Bedeutung

The Element <trackRef> is referencing the track elements used by the train and described in detail in an infrastructure branch of the railml file.

Das Element <trackRef> referenziert track Elemente die vom Zug befahren werden und in einem Infrastrukturast der railML Datei näher beschrieben sind.

Attributes of trackRef / Attribute von trackRef

• dir: This defines the validity of trackRef along the track. Possible values are:

• none: trackRef 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: trackRef is valid in both directions.
• unknown: trackRef is restricted to a certain direction, but this direction is not known.

Only up and down are reasonable over here. For an unknown direction the optional attribute dir should be skipped.

• ref: This refers to the id attribute of the associated <track> element.

• xs:anyAttribute: This provides an extension point for non-railML^® attributes in a foreign namespace. How to use it?

Syntactic Constraints / Syntaktische Beschränkungen

• dir: xs:string, generic type for more constrained direction statements: enumeration up, down, unknown; derived from tLaxDirection; optional
  

• ref xs:IDREF, mandatory

Best practice & Examples / Empfohlene Anwendung & Beispiele

Not yet described. / Noch nicht beschrieben.

Notes / Anmerkungen

See also How to reference infrastructure

Open issues / Offene Punkte/Pendenzen

Not yet described. / Noch nicht beschrieben.