{
  "$schema": "http://json-schema.org/draft-07/schema#",
  "additionalProperties": true,
  "properties": {
    "_slug": {
      "description": "Entry identifier (URL slug / filename without extension)",
      "type": "string"
    },
    "internal": {
      "description": "Internal key (e.g. navigation-header, navigation-footer)",
      "type": "string"
    },
    "links": {
      "description": "Navigation entries (references to link, page or post)",
      "items": {
        "description": "Reference (slug) to one of: link, page, post",
        "type": "string"
      },
      "type": "array"
    },
    "name": {
      "description": "Display name of navigation",
      "type": "string"
    }
  },
  "required": [
    "_slug",
    "name",
    "internal",
    "links"
  ],
  "type": "object"
}