add pointer to CIMI docs

documentation/user_guide/api.rst

@@ -0,0 +1,30 @@
+API
+===
+
+The mF2C system is equipped with a RESTful (HTTP) API for the management of infrastructure resources. 
+This API is based on the Cloud Infrastructure Management Interface (CIMI_) specification from DMTF.
+
+The CIMI standard defined patterns for all the usual database actions: Search (or Query), Create, Read, Update, and Delete (SCRUD).
+
++---------------+-------------+---------------------+
+| Action        | HTTP Method | Target              |
++===============+=============+=====================+
+| Search        | GET or PUT  | resource collection |
++---------------+-------------+---------------------+
+| Add (create)  | POST        | resource collection |
++---------------+-------------+---------------------+
+| Read          | GET         | resource            |
++---------------+-------------+---------------------+
+| Edit (update) | PUT         | resource            |
++---------------+-------------+---------------------+
+| Delete        | DELETE      | resource            |
++---------------+-------------+---------------------+
+
+
+The mF2C API implementation has been adopted from the open source implementation used in SlipStream_. 
+
+
+.. _CIMI: https://www.dmtf.org/sites/default/files/standards/documents/DSP0263_2.0.0.pdf
+.. _SlipStream: http://ssapi.sixsq.com/#resource-selection
+
+

documentation/user_guide/index.rst

@@ -7,4 +7,4 @@ This is the user guide
    :maxdepth: 1
    :hidden:
 
-
+   api.rst