{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "schema:MemberProgramTier",
  "title": "MemberProgramTier",
  "description": "A MemberProgramTier specifies a tier under a loyalty (member) program, for example \"gold\".",
  "type": "object",
  "allOf": [
    {
      "description": "A utility class that serves as the umbrella for a number of 'intangible' things such as quantities, structured values, etc.",
      "$ref": "schema:Intangible"
    }
  ],
  "properties": {
    "hasTierBenefit": {
      "description": "A member benefit for a particular tier of a loyalty program.",
      "oneOf": [
        { "$ref": "schema:TierBenefitEnumeration" },
        {
          "type": "array",
          "items": { "$ref": "schema:TierBenefitEnumeration" }
        }
      ]
    },
    "hasTierRequirement": {
      "description": "A requirement for a user to join a membership tier, for example: a CreditCard if the tier requires sign up for a credit card, A UnitPriceSpecification if the user is required to pay a (periodic) fee, or a MonetaryAmount if the user needs to spend a minimum amount to join the tier. If a tier is free to join then this property does not need to be specified.",
      "oneOf": [
        {
          "anyOf": [
            { "type": "string" },
            { "$ref": "schema:CreditCard" },
            { "$ref": "schema:MonetaryAmount" },
            { "$ref": "schema:UnitPriceSpecification" }
          ]
        },
        {
          "type": "array",
          "items": {
            "anyOf": [
              { "type": "string" },
              { "$ref": "schema:CreditCard" },
              { "$ref": "schema:MonetaryAmount" },
              { "$ref": "schema:UnitPriceSpecification" }
            ]
          }
        }
      ]
    },
    "isTierOf": {
      "description": "The member program this tier is a part of.",
      "$ref": "schema:MemberProgram"
    },
    "membershipPointsEarned": {
      "description": "The number of membership points earned by the member. If necessary, the unitText can be used to express the units the points are issued in. (E.g. stars, miles, etc.)",
      "anyOf": [{ "type": "number" }, { "$ref": "schema:QuantitativeValue" }]
    }
  }
}