Merge pull request OAI#927 from ePaul/content-parameter

Mention that Content objects can also be in parameters or response headers

Author: webron

versions/3.0.md

@@ -774,7 +774,7 @@ the example must follow the prescribed serialization strategy for the parameter.
 
 Field Name | Type | Description
 ---|:---:|---
-<a name="parameterContent"></a>content | [Content Object](#contentObject) | The content of the request body.
+<a name="parameterContent"></a>content | [Content Object](#contentObject) | The content of the parameter.
 
 In order to support common ways of serializing simple parameters, a set of `style` values are defined.
 
@@ -1027,7 +1027,8 @@ content:
 
 #### <a name="contentObject"></a>Content Object
 
-Describes a set of supported content types. A content object can be used in [requestBody](#requestBody) and [response objects](#responseObject).
+Describes a set of supported content types. A content object can be used in [requestBody](#requestBody),
+[parameter objects](#parameterObject), [header objects](#headerObject), and [response objects](#responseObject).
 
 Each key in the content object is the media-type of the [Content Type Object](#contentTypeObject).