Schema.org BreadcrumbList

{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "https://schema.org/schemas/breadcrumb-list.json",
  "title": "Schema.org BreadcrumbList",
  "description": "A BreadcrumbList is an ItemList consisting of a chain of linked Web pages, typically described using at least their URL and their name, and typically ending with the current page.",
  "type": "object",
  "required": ["@type", "itemListElement"],
  "properties": {
    "@type": {
      "type": "string",
      "const": "BreadcrumbList",
      "description": "The Schema.org type."
    },
    "@context": {
      "type": "string",
      "default": "https://schema.org"
    },
    "itemListElement": {
      "type": "array",
      "description": "The list of breadcrumb items.",
      "items": {
        "$ref": "#/$defs/ListItem"
      }
    },
    "name": {
      "type": "string",
      "description": "The name of the breadcrumb list."
    },
    "description": {
      "type": "string",
      "description": "A description of the breadcrumb list."
    },
    "numberOfItems": {
      "type": "integer",
      "description": "The number of items in the breadcrumb list."
    }
  },
  "$defs": {
    "ListItem": {
      "type": "object",
      "description": "An item in a breadcrumb list.",
      "required": ["@type", "position"],
      "properties": {
        "@type": { "type": "string", "const": "ListItem" },
        "position": { "type": "integer", "description": "The position of an item in a series." },
        "name": { "type": "string", "description": "The name of the item." },
        "item": {
          "oneOf": [
            { "type": "string", "format": "uri" },
            { "type": "object", "properties": { "@type": { "type": "string" }, "@id": { "type": "string", "format": "uri" }, "name": { "type": "string" } } }
          ],
          "description": "The item represented by this list item."
        }
      }
    }
  }
}