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(P3019)
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English
railway signalling system
type of signalling used on this railway line
signalling system
signalling type
type of signalling
In more languages
Data type
Item
Statements
instance of
Wikidata property related to rail transport
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Wikidata item of this property
railway signalling system
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Wikidata property example
Ådalen Line
railway signalling system
European Rail Traffic Management System
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Bari–Barletta railway line
railway signalling system
Telephonic block
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West Highland Line
railway signalling system
radio electronic token block
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stability of property value
sometimes changes
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property proposal discussion
https://www.wikidata.org/wiki/Wikidata:Property_proposal/signalling_system
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Constraints
property constraint
subject type constraint
class
railway line
relation
instance of
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value-type constraint
class
railway signalling system
relation
instance of
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property scope constraint
constraint status
mandatory constraint
property scope
as main value
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