Index: trunk/docs/install/installation.rst
===================================================================
--- trunk/docs/install/installation.rst	(revision 947)
+++ trunk/docs/install/installation.rst	(revision 950)
@@ -277,4 +277,17 @@
   $ ./configure --with-xml2config=/usr/local/bin/xml2-config
 
+OGC API - Processing Support (Optional) 
+****************************************
+
+In case you want to activate the support for `OGC API - Processing
+<https://github.com/opengeospatial/wps-rest-binding>`__, you 
+can do so by using the *--with-json*: You will then need to coy the 
+``oas.cfg`` file in the same directory as your ``main.cfg``. For
+instance, one may use the following command:
+
+::
+
+  $ ./configure --with-json=/usr/
+  
 Python Support (Optional) 
 **************************
Index: trunk/docs/kernel/configuration.rst
===================================================================
--- trunk/docs/kernel/configuration.rst	(revision 947)
+++ trunk/docs/kernel/configuration.rst	(revision 950)
@@ -429,5 +429,75 @@
   included services if the ``libPath`` parameter is not set.
 
-      
+
+OpenAPI Specification configuration file
+-----------------------------------------
+
+Since revision 949 of the ZOO-Kernel, you can now activate the OGC
+API - Processing support. In such a case you will need to have an
+``oas.cfg`` file located in tne same directory where the ``main.cfg`` is.
+
+This ``oas.cfg`` file gets the same syntactic rules than the
+``main.cfg``. The ZOO-Kernel uses this file to produce information
+about the open API specification it is referring to. 
+
+The first section to be found in the ``oas.cfg`` file should be the
+``[openapi]``. It contains the following parameters:
+
+ * ``rootUrl``: the URL to access the ZOO-Kernel using OGC API - Processing
+ * ``links``: the links provided from the root
+ * ``paths``: the full paths list
+ * ``parameters``: the parameters list defined in paths
+ * ``header_parameters``: the parameters list client applications can send as header
+ * ``version``: the Open API Specification version
+   
+For any links and paths ``/A`` defined, you will have a corresponding
+``[/A]`` and ``[A]`` sections. In the ``[/A]`` section you will define
+the rel, type and title used from the root URL to produce the `links
+<https://github.com/opengeospatial/wps-rest-binding/blob/master/core/openapi/schemas/link.yaml>`__
+list and the `paths object
+<https://github.com/OAI/OpenAPI-Specification/blob/master/versions/3.0.0.md#pathsObject>`__
+from. In the corresponding ``[A]`` section, you will define the
+following parameters:
+
+ * ``method``: the HTTP method to use to access this resource
+ * ``title``: resource title
+ * ``abstract``: resource description 
+ * ``tags``: tags to classify this resource
+ * ``tags_description``: the tag description
+ * ``schema``: the schema specifying the resource
+
+In case you want to define multiple methods to access a resource,  you
+can then use the length parameter to define the number of parameters
+group to parse, then use ``method_1``, ``title_1``, ``abstract_1``,
+``tags_1``, ``tags_description_1`` and ``schema_1`` and so on to add
+one or more access method (and other attributes) to this resource.
+
+When declaring resource access you may want to add a parameter to your
+request. In such a case, you can add a parameter named "parameters"
+which contain the supported parameters list. All parameters defined
+should be rooted in the components field. Parameters which can be used
+in the path will be identified by ``{NAME}`` and will get a specific
+section for its definition:
+
+ * ``type``: nature of the parameter (i.e. string)
+ * ``title``: parameter title
+ * ``abstract``: parameter description
+ * ``in``: where the parameter can be used (ie. path, header, query)
+ * ``required``: define if the parameter is optional (false) or not (true)
+ * ``example``: (optional) provide an example value / URL
+   
+In addition to the sections defined previously, there are three other
+sections that we did not cover yet. Theses sections are:
+
+ * ``[requestBody]``: defining the request body abstract (description), type (application/json) and schema (reference).
+ * ``[exception]``: defining the exception bastract (description), type (application/json) and schema (reference).
+ * ``[conformTo]``: referring to links list of the requirements classes the server implements and conforms to
+
+For more information on how to interact with this WPS REST Binding, please refer
+to this `page
+<https://github.com/opengeospatial/wps-rest-binding#overview>`__ or use
+the `Swagger UI <https://swagger.io/tools/swagger-ui/>`__. A live
+instance is available `here <https://demo.mapmint.com/swagger-ui/dist/>`__.
+  
 .. rubric:: Footnotes
 
