anchor.diff:  + Response 200 (text/vnd.apiblueprint)
   
           :[](fixtures/apib/composer.apib)
  -
  -+ Request Compose API Blueprint from AST 2.0 sent as YAML (application/vnd.apiblueprint.ast+yaml; version=2.0)
  -
  -        :[](fixtures/apib/normal.apiblueprint.ast.yaml)
  -
  -+ Response 200 (text/vnd.apiblueprint)
  -
  -        :[](fixtures/apib/normal.apib)
  -
  -+ Request Compose API Blueprint from AST 2.0 sent as JSON (application/vnd.apiblueprint.ast+json; version=2.0)
  -
  -        :[](fixtures/apib/normal.apiblueprint.ast.json)
  -
  -+ Response 200 (text/vnd.apiblueprint)
  -
  -        :[](fixtures/apib/normal.apib)
  
positive.code: application/vnd.refract+json
  application/vnd.refract.parse-result+json
  ```
  
  ##### API Blueprint AST (Deprecated)
  
  API Blueprint AST support is deprecated and support will be completely removed
  from the service by February 28th 2016.
  
  ```
  application/vnd.apiblueprint.ast+json
  application/vnd.apiblueprint.ast+yaml
  ```
  
  Serialized API Blueprint AST represented either in its JSON or YAML format as defined in [API Blueprint AST Serialization Media Types](https://github.com/apiaryio/api-blueprint-ast).
  
  Please keep in mind that the API Blueprint AST is soon to be deprecated in favor of the API Description Parse Result Namespace.
  
  #### Output Media Types
  
  
negative.code: Reverse the parsing process--compose an API description format.
  
  ### Compose [POST]
  
  #### Input Media Types
  
  