IS:balise

balise

Scheme description / Schemenbeschreibung

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

Parent: <balises>
Children: <additionalName> (introduced with version 2.1), <any>, <geoCoord>, <states>

Multiplicity / Anzahl

Semantics / Bedeutung

A <balise> defines a single balise and its attributes. A balise is an electronic beacon or transponder placed between the rails of a railway as part of an Automatic Train Protection (ATP) system. ^[1]

Attributes of balise / Attribute von balise

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): 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. Abkürzung), die zur Identifizierung des Objekts auch bei Austauschpartnern verwendet wird, wobei spezifische Eindeutigkeitsbeschränkungen gelten können. 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 <additionalName> 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: This defines the validity of <balise> along the track. Possible values are:

none: <balise> 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: <balise> is valid in both directions.
unknown: <balise> is restricted to a certain direction, but this direction is not known.

countryID: This is the ID number for each country. It is used to determine to which country a balise belongs.

groupID: balises and baliseGroups can be joined to groups. groupID is needed to determine if a balise belongs to a group and if yes, to which one.

linkingAccuracy margin error between balise

linkReactionAscending Reaction to be performed if a linking or a balise group message consistency problem occurs with the balise group linked to in ascendig direction ^[2]

linkReactionDescending Reaction to be performed if a linking or a balise group message consistency problem occurs with the balise group linked to in descendig direction^[2]
staticTelegram: the telegram coded to the balise; representation of the binary telegram shall be a hex string

ndx Position of the balise inside of the group ^[3]

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
countryID optional, up to 1023 countries

groupID optional, up to 16383 groups

linkingAccuracy optional

linkReactionAscending optional

linkReactionDescending optional

staticTelegram xs:string with further constraints to allow only HEX string patterns [0-9a-fA-F]*, optional — (introduced with version 2.4): an arbitrary string consisting of hex digits from 0 to 9, a to f; not allowing white space, letters; no length restriction

ndx optional

Best practice & Examples / Empfohlene Anwendung & Beispiele

Not yet described. / Noch nicht beschrieben.

Notes / Anmerkungen

Don't mix up groups of balises in the sense of baliseGroup with the groups defined by the groupIDs. A baliseGroup can also be part of a group of balise elements with a certain ID.

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