$schema: http://json-schema.org/schema#

definitions:
  site:
    type: object
    properties:
      type:
        type: string
      version:
        type: string
        pattern: '^v.+$'

type: object
properties:
  sites:
    type: object
    additionalProperties:
      $ref: '#/definitions/site'

additionalProperties: false
required:
  - sites