{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "schema:ProductGroup",
  "title": "ProductGroup",
  "description": "A ProductGroup represents a group of [[Product]]s that vary only in certain well-described ways, such as by [[size]], [[color]], [[material]] etc.\n\nWhile a ProductGroup itself is not directly offered for sale, the various varying products that it represents can be. The ProductGroup serves as a prototype or template, standing in for all of the products who have an [[isVariantOf]] relationship to it. As such, properties (including additional types) can be applied to the ProductGroup to represent characteristics shared by each of the (possibly very many) variants. Properties that reference a ProductGroup are not included in this mechanism; neither are the following specific properties [[variesBy]], [[hasVariant]], [[url]]. ",
  "type": "object",
  "allOf": [
    {
      "description": "Any offered product or service. For example: a pair of shoes; a concert ticket; the rental of a car; a haircut; or an episode of a TV show streamed online.",
      "$ref": "schema:Product"
    }
  ],
  "properties": {
    "hasVariant": {
      "description": "Indicates a [[Product]] that is a member of this [[ProductGroup]] (or [[ProductModel]]).",
      "oneOf": [
        { "$ref": "schema:Product" },
        { "type": "array", "items": { "$ref": "schema:Product" } }
      ]
    },
    "productGroupID": {
      "description": "Indicates a textual identifier for a ProductGroup.",
      "oneOf": [
        { "type": "string" },
        { "type": "array", "items": { "type": "string" } }
      ]
    },
    "variesBy": {
      "description": "Indicates the property or properties by which the variants in a [[ProductGroup]] vary, e.g. their size, color etc. Schema.org properties can be referenced by their short name e.g. \"color\"; terms defined elsewhere can be referenced with their URIs.",
      "oneOf": [
        { "anyOf": [{ "type": "string" }, { "$ref": "schema:DefinedTerm" }] },
        {
          "type": "array",
          "items": {
            "anyOf": [{ "type": "string" }, { "$ref": "schema:DefinedTerm" }]
          }
        }
      ]
    }
  }
}