openapi: 3.0.2
info:
  title: Example references
  version: 1.0.0
paths:
  /foo:
    get:
      responses:
        '200':
          $ref: './domain.yaml#/components/responses/200ok'

components:
  responses:
    200ok:
      description: ok
      content:
        application/json:
          schema:
            type: string
          examples:
            ex1:
              $ref: '#/components/examples/ex1'

  examples:
    ex1:
      value: hello