{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "https://schema.org/schemas/offer.json",
  "title": "Schema.org Offer",
  "description": "An offer to transfer some rights to an item or to provide a service, for example an offer to sell tickets to an event or to rent a movie.",
  "type": "object",
  "required": ["@type"],
  "properties": {
    "@type": {
      "type": "string",
      "description": "The Schema.org type.",
      "enum": ["Offer", "AggregateOffer"]
    },
    "@context": {
      "type": "string",
      "default": "https://schema.org"
    },
    "name": {
      "type": "string",
      "description": "The name of the offer."
    },
    "description": {
      "type": "string",
      "description": "A description of the offer."
    },
    "url": {
      "type": "string",
      "format": "uri",
      "description": "URL of the offer."
    },
    "price": {
      "oneOf": [
        { "type": "number" },
        { "type": "string" }
      ],
      "description": "The offer price."
    },
    "priceCurrency": {
      "type": "string",
      "pattern": "^[A-Z]{3}$",
      "description": "The currency of the price (ISO 4217)."
    },
    "priceValidUntil": {
      "type": "string",
      "format": "date",
      "description": "The date after which the price is no longer available."
    },
    "availability": {
      "type": "string",
      "enum": ["BackOrder", "Discontinued", "InStock", "InStoreOnly", "LimitedAvailability", "OnlineOnly", "OutOfStock", "PreOrder", "PreSale", "SoldOut"],
      "description": "The availability of this item."
    },
    "availabilityStarts": {
      "type": "string",
      "format": "date-time",
      "description": "The beginning of the availability of the product."
    },
    "availabilityEnds": {
      "type": "string",
      "format": "date-time",
      "description": "The end of the availability of the product."
    },
    "itemCondition": {
      "type": "string",
      "enum": ["DamagedCondition", "NewCondition", "RefurbishedCondition", "UsedCondition"],
      "description": "The condition of the item."
    },
    "seller": {
      "oneOf": [
        { "$ref": "schema-org-person-schema.json" },
        { "$ref": "schema-org-organization-schema.json" }
      ],
      "description": "The entity offering the item."
    },
    "offeredBy": {
      "oneOf": [
        { "$ref": "schema-org-person-schema.json" },
        { "$ref": "schema-org-organization-schema.json" }
      ],
      "description": "A pointer to the organization making the offer."
    },
    "itemOffered": {
      "type": "object",
      "description": "The item being offered.",
      "properties": {
        "@type": { "type": "string" },
        "name": { "type": "string" }
      }
    },
    "sku": {
      "type": "string",
      "description": "The Stock Keeping Unit."
    },
    "gtin": {
      "type": "string",
      "description": "A Global Trade Item Number."
    },
    "mpn": {
      "type": "string",
      "description": "The Manufacturer Part Number."
    },
    "validFrom": {
      "type": "string",
      "format": "date-time",
      "description": "The date when the item becomes valid."
    },
    "validThrough": {
      "type": "string",
      "format": "date-time",
      "description": "The date after when the item is not valid."
    },
    "eligibleRegion": {
      "type": "string",
      "description": "The ISO 3166-1 (ISO 3166-1 alpha-2) or ISO 3166-2 code for the eligible region."
    },
    "eligibleQuantity": {
      "type": "object",
      "description": "The interval and unit of measurement of ordering quantities.",
      "properties": {
        "@type": { "type": "string", "const": "QuantitativeValue" },
        "value": { "type": "number" },
        "minValue": { "type": "number" },
        "maxValue": { "type": "number" },
        "unitCode": { "type": "string" }
      }
    },
    "deliveryLeadTime": {
      "type": "object",
      "description": "The typical delay between the receipt of the order and the goods either leaving the warehouse or being prepared for pickup.",
      "properties": {
        "@type": { "type": "string", "const": "QuantitativeValue" },
        "value": { "type": "number" },
        "unitCode": { "type": "string" }
      }
    },
    "shippingDetails": {
      "$ref": "#/$defs/OfferShippingDetails",
      "description": "Indicates information about the shipping policies and options."
    },
    "hasMerchantReturnPolicy": {
      "$ref": "#/$defs/MerchantReturnPolicy",
      "description": "Specifies a MerchantReturnPolicy."
    },
    "review": {
      "oneOf": [
        { "$ref": "schema-org-review-schema.json" },
        { "type": "array", "items": { "$ref": "schema-org-review-schema.json" } }
      ],
      "description": "A review of the offer."
    },
    "aggregateRating": {
      "$ref": "schema-org-aggregate-rating-schema.json",
      "description": "The overall rating."
    },
    "lowPrice": {
      "type": "number",
      "description": "The lowest price of all offers available (for AggregateOffer)."
    },
    "highPrice": {
      "type": "number",
      "description": "The highest price of all offers available (for AggregateOffer)."
    },
    "offerCount": {
      "type": "integer",
      "description": "The number of offers for the product (for AggregateOffer)."
    },
    "sameAs": {
      "oneOf": [
        { "type": "string", "format": "uri" },
        { "type": "array", "items": { "type": "string", "format": "uri" } }
      ],
      "description": "URL of a reference Web page that unambiguously indicates the item's identity."
    }
  },
  "$defs": {
    "OfferShippingDetails": {
      "type": "object",
      "description": "Shipping details for an offer.",
      "properties": {
        "@type": { "type": "string", "const": "OfferShippingDetails" },
        "shippingRate": {
          "type": "object",
          "properties": {
            "@type": { "const": "MonetaryAmount" },
            "value": { "type": "number" },
            "currency": { "type": "string" }
          }
        },
        "shippingDestination": {
          "type": "object",
          "properties": {
            "@type": { "const": "DefinedRegion" },
            "addressCountry": { "type": "string" }
          }
        },
        "deliveryTime": {
          "type": "object",
          "properties": {
            "@type": { "const": "ShippingDeliveryTime" },
            "handlingTime": { "type": "object" },
            "transitTime": { "type": "object" }
          }
        }
      }
    },
    "MerchantReturnPolicy": {
      "type": "object",
      "description": "A MerchantReturnPolicy.",
      "properties": {
        "@type": { "type": "string", "const": "MerchantReturnPolicy" },
        "applicableCountry": { "type": "string" },
        "returnPolicyCategory": { "type": "string", "enum": ["MerchantReturnFiniteReturnWindow", "MerchantReturnNotPermitted", "MerchantReturnUnlimitedWindow", "MerchantReturnUnspecified"] },
        "merchantReturnDays": { "type": "integer" },
        "returnMethod": { "type": "string", "enum": ["ReturnAtKiosk", "ReturnByMail", "ReturnInStore"] },
        "returnFees": { "type": "string", "enum": ["FreeReturn", "OriginalShippingFees", "RestockingFees", "ReturnFeesCustomerResponsibility", "ReturnShippingFees"] }
      }
    }
  }
}