json_schema: {
      "$schema": "http://json-schema.org/draft-04/schema#",
      "additionalProperties": true,
      "definitions": {
          "link": {
              "properties": {
                  "href": {
                      "type": "string"
                  },
                  "properties": {
                      "$ref": "#/definitions/property"
                  },
                  "rel": {
                      "type": "string"
                  },
                  "template": {
                      "_format": "uri",
                      "type": "string"
                  },
                  "titles": {
                      "additionalProperties": {
                          "type": "string"
                      },
                      "properties": {
                          "default": {
                              "type": "string"
                          }
                      },
                      "type": "object"
                  },
                  "type": {
                      "type": "string"
                  }
              },
              "type": "object"
          },
          "property": {
              "additionalProperties": {
                  "type": [
                      "null",
                      "string"
                  ]
              },
              "type": "object"
          }
      },
      "properties": {
          "aliases": {
              "items": {
                  "type": "string"
              },
              "type": "array"
          },
          "expires": {
              "_format": "date-time",
              "type": "string"
          },
          "links": {
              "items": {
                  "$ref": "#/definitions/link"
              },
              "type": "array"
          },
          "properties": {
              "$ref": "#/definitions/property"
          },
          "subject": {
              "_format": "uri",
              "type": "string"
          }
      },
      "required": [
          "subject"
      ],
      "title": "JSON schema for host-meta files",
      "type": "object"
  }