diff --git a/dox/source/examples.rst.inc b/dox/source/examples.rst.inc
index 53c511d..5f778b7 100644
--- a/dox/source/examples.rst.inc
+++ b/dox/source/examples.rst.inc
@@ -2,5 +2,111 @@
 Simplest driver skeleton
 ========================
 
+lets review a simplest driver example provided in project repository.
+
 Please see ``barebones/simple`` directory for this example's source code.
 
+-----------------
+Driver descriptor
+-----------------
+
+
+First we need to provide driver descriptor structure.
+
+.. code:: c
+
+    pod_driver simple_driver = {
+        POD_DRIVER_MAGIC,
+        POD_DRIVER_VERSION,
+        POD_DRIVER_ARCH_UNKNOWN,
+
+        POD_DEV_CLASS_VIDEO, 0, 0, 0,
+
+        "simple driver skeleton - RENAME ME!",
+
+        {
+            simple_driver_construct,
+            simple_driver_destruct,
+
+
+            simple_driver_activate,
+            simple_driver_deactivate,
+
+
+            simple_driver_sense
+        },
+
+        0, // no optional entry points
+
+        0, // no properties
+
+        0, // Private state does not exist yet
+
+        0, // Statically linked, no need for kernel entry points struct
+
+    };
+
+The only notable things here are:
+
+* ``POD_DEV_CLASS_VIDEO`` - we declare that this is a video driver. OS might decide to start different 
+  drivers sooner or later, or to group drivers start by classes.
+
+* ``simple_driver_X`` - entry points to start and stop our driver by OS.
+
+
+-----------------
+Device descriptor
+-----------------
+
+Our driver will provide just one and only device, so device descriptor
+can be static too.
+
+.. code:: c
+
+    pod_device simple_device =
+    {
+        POD_DEVICE_MAGIC, // magic
+
+        POD_DEV_CLASS_VIDEO, 
+        0, 0,
+        0, 	// flags
+
+        // Device name, either static or runtime-generated
+        "simple driver skeleton device name - RENAME ME!",
+
+        &simple_driver,
+
+        &dev_func, 	// dev io entry points
+
+        0, 	// no properties
+
+        0, 	// dev class specific interface
+        0, 	// private data
+
+        0,	// default request q
+        0,	// request we do now
+        0,	// thread used to run requests
+        0,	// triggered to run next request
+
+    };
+
+Again, we note that dev class is ``POD_DEV_CLASS_VIDEO``. It is critical to be 
+correct - OS will connect device to its users based on this.
+
+We provide device entry points for async interface, but all of them are default
+ones provided by OpenPOD library.
+
+.. code:: c
+
+    static pod_dev_f dev_func = 
+    {
+        pod_default_enqueue,
+        pod_default_dequeue,
+        pod_default_fence,
+        pod_default_raise
+    };
+
+First of them, ``pod_default_enqueue``, will just call syncronous entry point of driver,
+three other are no-ops.
+
+
diff --git a/dox/source/index.rst b/dox/source/index.rst
index 400f726..57c8e8a 100644
--- a/dox/source/index.rst
+++ b/dox/source/index.rst
@@ -30,11 +30,16 @@ Source codes for the project (and for this book) can be found in `OpenPOD GitHub
 
 .. _PDF format: https://buildmedia.readthedocs.org/media/pdf/phantomdox/latest/phantomdox.pdf
 
+.........
+Rationale
+.........
+
+
 .. include:: introduction.rst.inc
 
-.................
-Project structure
-.................
+..................
+Project navigation
+..................
 
 .. include:: directories.rst.inc
 
diff --git a/dox/source/introduction.rst.inc b/dox/source/introduction.rst.inc
index c9a68ab..19990ad 100644
--- a/dox/source/introduction.rst.inc
+++ b/dox/source/introduction.rst.inc
@@ -36,4 +36,4 @@ Goal is to define API and driver structure that is:
 
 Current state of specification: It is partially complete and waits for your comments.
 
-The best way to comment is to create an issue in project's GitHub repository: <https://github.com/dzavalishin/openpod/issues>.
+The best way to comment is to create an issue in project's `GitHub repository: <https://github.com/dzavalishin/openpod/issues>`_.
diff --git a/dox/source/structure.rst.inc b/dox/source/structure.rst.inc
index 003a854..db22b4b 100644
--- a/dox/source/structure.rst.inc
+++ b/dox/source/structure.rst.inc
@@ -5,12 +5,13 @@ OpenPOD driver includes:
   
   Driver descriptor is a required part of a driver.
 
-* **Device descriptor.** A structure which describes each device exported by driver. Can be single and
-static, or can be dynamically allocated in run time. For example, USB disk driver can create device
-descriptors dynamically as devices come and go.
 
-Device descriptor is not a required part - there can be driver which does not export devices at all
-or just starts with empty set of devices. But most drivers will provide at least one device at start.
+* **Device descriptor.** A structure which describes each device exported by driver. Can be single and
+  static, or can be dynamically allocated in run time. For example, USB disk driver can create device
+  descriptors dynamically as devices come and go.
+
+  Device descriptor is not a required part - there can be driver which does not export devices at all
+  or just starts with empty set of devices. But most drivers will provide at least one device at start.
 
 * **Driver and/or device properties.** Set of key=value parameters to control driver or device and 
   request meta information. For example, sound driver can set sampling rate with corresponding