{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "schema:BoardingPolicyType",
  "title": "BoardingPolicyType",
  "description": "A type of boarding policy used by an airline.",
  "type": "string",
  "oneOf": [
    {
      "description": "The airline boards by groups based on check-in time, priority, etc.",
      "const": "GroupBoardingPolicy"
    },
    {
      "description": "The airline boards by zones of the plane.",
      "const": "ZoneBoardingPolicy"
    }
  ]
}
