Updates execution/asynchronous-tasks.md

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execution/asynchronous-tasks.md

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 # Asynchronous Tasks
-If an API operation is asynchronous, but its progress could be tracked by a client the response to such an operation MUST return the 
+If an API operation is asynchronous, but its progress could be tracked by a client, the response to such an asynchronous operation **MUST** return, in the case of success, the **202 Accepted** status code together with a `application/hal+json` representation of a new task-tracking resource. 
+
+
+## Task Resource
+The task resource **SHOULD** convey the information about the status of the asynchronous task. 
+
+Retrieval of such a resource using the HTTP GET Request Method **SHOULD** be designed as follows:
+
+1. Task is Still Processing
+
+    Return **200 OK** and representation of the current status.
+
+2. Task Successfully Completed
+
+    Return **303 See Other** together with [HTTP Location Header](https://tools.ietf.org/html/rfc7231#section-7.1.2) with URI or a outcome resource.
+
+3. Task Failed
+
+    Return **200 OK** and `application/problem+json` with the problem detail information on the task has failed.