``` /** id type */ type id = integer;

/* @title User */ type user = struct { /* unique id of the user / id: id, name: string?, type: enum {"admin", "writer", "reader"}, SNSs: [string], }; /* * @title Group * this expresses a group of users */ type group = struct { id: id, members: [user], }; ```

console $ cargo run etc/test.jsd

```json { "group": { "description": "this expresses a group of users", "properties": { "id": { "$ref": "#/definitions/id" }, "members": { "items": { "$ref": "#/definitions/user" }, "type": "array" } }, "required": [ "id", "members" ], "title": "Group", "type": "object" }, "id": { "description": "id type", "type": "integer" }, "user": { "properties": { "SNSs": { "items": { "type": "string" }, "type": "array" }, "id": { "$ref": "#/definitions/id", "description": "unique id of the user" }, "name": { "nullable": true, "type": "string" }, "type": { "enum": [ "admin", "writer", "reader" ] } }, "required": [ "id", "name", "type", "SNSs" ], "title": "User", "type": "object" } }

```