Api-blueprint: 扩展数据结构

嗨，我有一个关于数据结构的问题/建议。 也许这与 MSON 相关，但我将从这里开始。 为了保持数据结构的整洁，我希望尽可能少的重复数据，因此如果数据结构可以相互扩展就好了。

假设以下数据结构：

# Data Structures

## Project_Link (object) 
+ self: `https://test.api.com/projects/5` (string, required)

## Project1_Get (object)
+ type: `projects` (string, required)
+ id: `5` (string, required)
+ attributes (object, required)
    + number: `PRO-5` (string) - A readable identifier for employees to refer to projects.
+ links (Project_Link, required)

在links属性Project1_Get我重复使用Project_Link对象，它的伟大工程。 但假设我还需要以下 DataStructure：

## Project1_Identifier (object)
+ type: `projects` (string, required)
+ id: `5` (string, required)

现在我的数据结构中有重复数据，因为Project1_Identifier包含type和id属性，但Project1_Get包含它。 如果我能做到以下几点就好了：

# Data Structures

## Project1_Link (object) 
+ self: `https://test.api.com/projects/5` (string, required)

## Project1_Identifier (object)
+ type: `projects` (string, required)
+ id: `5` (string, required)

## Project1_Get (Project_Identifier) <--- Extend!
+ attributes (object, required)
    + number: `PRO-5` (string) - A readable identifier for employees to refer to projects.
+ links (Project1_Link, required)

在以下示例中，起草者返回错误：

FORMAT: 1A
HOST: https://test.api.com/

# Test API
Hi, welcome to the API!

# Group Projects
Wow, we are using projects!

### Retrieve single project [GET /projects/{id}]
+ Parameters
    + id: `5` (string, required)

+ Response 200 (application/json)
    + Attributes (object)
        + data (Project1_Get, required)

# Data Structures

## Project_Link (object) 
+ self: `https://test.api.com/projects/5` (string, required)

## Project_Identifier (object)
+ type: `projects` (string, required)
+ id: `5` (string, required)

## Project1_Get (Project_Identifier)
+ type: `projects` (string, required)
+ id: `5` (string, required)
+ attributes (object, required)
    + number: `PRO-5` (string) - A readable identifier for employees to refer to projects.
+ links (Project_Link, required)

user<strong i="25">@development</strong>:/srv/www/docs$ drafter -v
v2.0.0-pre.1
user<strong i="26">@development</strong>:/srv/www/docs$ drafter --validate docs.md --use-line-num

error: (4)  base type 'Project1_Get' is not defined in the document; line 16, column 11 - line 16, column 40
warning: (8)  unable to find the symbol `Project1_Get` in the list of named types; line 16, column 11 - line 16, column 40