Simplify to define Message Binding Object only and use http server pr…

…otocol

sse/README.md

@@ -4,6 +4,8 @@ This document defines how to describe Server Sent Events-specific information on
 
 See the [Server-Sent Events protocol specification][protocolSpecification].
 
+Server-Sent Events requires `http` protocol, so the SSE [Message Binding Object](#message) below is appropriate for Servers with protocol `http`.
+
 <a name="version"></a>
 
 ## Version
@@ -22,17 +24,8 @@ This object MUST NOT contain any properties. Its name is reserved for future use
 
 ## Channel Binding Object
 
-When using Server Sent Events, the channel represents a single logical message stream flowing from server to client. 
-
-##### Fixed Fields
-
-Field Name | Type | Description
----|:---:|---
-<a name="operationBindingObjectQuery"></a>`query` | [Schema Object][schemaObject] \| [Reference Object](referenceObject) | A Schema object containing the definitions for each query parameter. This schema MUST be of type `object` and have a `properties` key.
-<a name="operationBindingObjectHeaders"></a>`headers` | [Schema Object][schemaObject] \| [Reference Object](referenceObject) | A Schema object containing the definitions of the HTTP headers to use when establishing the request. This schema MUST be of type `object` and have a `properties` key.
-<a name="operationBindingObjectBindingVersion"></a>`bindingVersion` | string | The version of this binding. If omitted, "latest" MUST be assumed.
+This object MUST NOT contain any properties. Its name is reserved for future use.
 
-This object MUST contain only the properties defined above.
 
 <a name="operation"></a>
 
@@ -51,12 +44,10 @@ This object contains information about the message representation in SSE.
 
 Field Name | Type | Description
 ---|:---:|---
-<a name="messageBindingObjectEventType"></a>`event` | string | Server-sent event type, defaults to `message` if omitted, by the [SSE specification][protocolSpecification]. |
+<a name="messageBindingObjectEventType"></a>`event` | string | Server-sent event type, typically `message`, to specify allowed SSE message types. |
 <a name="messageBindingObjectBindingVersion"></a>`bindingVersion` | string | The version of this binding. If omitted, "latest" MUST be assumed.
 
 This object MUST contain only the properties defined above.
 
 
-[schemaObject]: https://github.com/asyncapi/spec/blob/master/spec/asyncapi.md#schemaObject
-[referenceObject]: https://github.com/asyncapi/spec/blob/master/spec/asyncapi.md#referenceObject
 [protocolSpecification]: https://html.spec.whatwg.org/multipage/server-sent-events.html#server-sent-events