---
title: Keys for Transit Components
framework: foundation
role: collectionGroup
role_heading: API Collection
path: foundation/keys-for-transit-components
---

# Keys for Transit Components

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

## Topics

### Constants

- [airline](foundation/nstextcheckingkey/airline.md)
- [flight](foundation/nstextcheckingkey/flight.md)

## See Also

### Constants

- [Keys for Address Components](foundation/keys-for-address-components.md)
- [NSTextCheckingResult.CheckingType](foundation/nstextcheckingresult/checkingtype.md)
- [NSTextCheckingTypes](foundation/nstextcheckingtypes.md)
- [NSTextCheckingKey](foundation/nstextcheckingkey.md)
- [Anonymous](foundation/1476845-anonymous.md)