Imports in Fern Definition | Fern Documentation

Fern Definition isn’t recommended for new customers and Fern isn’t accepting feature requests for this format. It remains supported for existing users.

Imports allow you to reference types and errors from other files.

person.yml

1 types:
2   Person: ...

family.yml

1 imports:
2   person: ./path/to/person.yml
3 types:
4   Family:
5     properties:
6       people: list<person.Person> # use an imported type

Note that you can only import files that exist in your Fern Definition (i.e., in the same definition/ folder).

1	imports:
2	person: ./path/to/person.yml
3	types:
4	Family:
5	properties:
6	people: list<person.Person> # use an imported type