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  "title" : "Keys for Transit Components"
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# Keys for Transit Components

The following constants identify the possible keys returned in the components dictionary.

## Topics

### Constants

[`NSTextCheckingAirlineKey`](/documentation/Foundation/NSTextCheckingKey/airline)

A key that corresponds to the airline of a transit result.

[`NSTextCheckingFlightKey`](/documentation/Foundation/NSTextCheckingKey/flight)

A key that corresponds to the flight component of a transit result.


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