diff --git a/.gitignore b/.gitignore
index 73ee260b..9dc5c298 100644
--- a/.gitignore
+++ b/.gitignore
@@ -2,4 +2,5 @@
 .tox
 django_viewflow.egg-info
 db.sqlite3
+docs/_build/**
 tests/local_settings.py
diff --git a/Makefile b/Makefile
new file mode 100644
index 00000000..2f831172
--- /dev/null
+++ b/Makefile
@@ -0,0 +1,2 @@
+build_docs:
+	sphinx-build -b html docs/ docs/_build/
\ No newline at end of file
diff --git a/README.rst b/README.rst
index eea8f354..2014ce6f 100644
--- a/README.rst
+++ b/README.rst
@@ -7,14 +7,25 @@ Ad-hoc business process automation framework for Django
 django-viewflow provides simple, django friendly way to organize views, background jobs, user permission checking,
 in one clearly defined task flow.
 
-django-viewflow does not introduce any restriction on views, urls or celery tasks, and should plays well
-in any other django project.
+Installation
+============
+
+django-viewflow requires Python 3.3 or grater and django 1.7::
+
+    pip install django-viewflow
+
+And add it into INSTALLED_APPS settings::
+    
+    INSTALLED_APPS = (
+         ...
+         viewflow,
+    )
 
 
 Quick start
 ===========
-Let's define basic Hello Process where one could start hello world request, and another approve it,
-when request approved, it should be send.
+Let's define basic Hello Process where one could start hello world request, another approve it,
+and when request approved, it should be send in background.
 
 Start with process model definition::
 
@@ -84,6 +95,13 @@ Next, you can see how to define custom views `TODO` meet with and other concepts
 
 More examples available in `tests\\examples` directory
 
+
+License
+======
+|The GNU General Public License v3.0|
+
+.. |The GNU General Public License v3.0| https://www.gnu.org/copyleft/gpl.html
+
 Change log
 ==========
 
diff --git a/docs/conf.py b/docs/conf.py
new file mode 100644
index 00000000..5daa087e
--- /dev/null
+++ b/docs/conf.py
@@ -0,0 +1,264 @@
+#!/usr/bin/env python3
+# -*- coding: utf-8 -*-
+#
+# django-viewflow documentation build configuration file, created by
+# sphinx-quickstart on Tue Apr 29 16:50:19 2014.
+#
+# This file is execfile()d with the current directory set to its
+# containing dir.
+#
+# Note that not all possible configuration values are present in this
+# autogenerated file.
+#
+# All configuration values have a default; values that are commented out
+# serve to show the default.
+
+import sys
+import os
+
+# If extensions (or modules to document with autodoc) are in another directory,
+# add these directories to sys.path here. If the directory is relative to the
+# documentation root, use os.path.abspath to make it absolute, like shown here.
+#sys.path.insert(0, os.path.abspath('.'))
+
+# -- General configuration ------------------------------------------------
+
+# If your documentation needs a minimal Sphinx version, state it here.
+#needs_sphinx = '1.0'
+
+# Add any Sphinx extension module names here, as strings. They can be
+# extensions coming with Sphinx (named 'sphinx.ext.*') or your custom
+# ones.
+extensions = [
+    'sphinx.ext.autodoc',
+    'sphinx.ext.todo',
+    'sphinx.ext.coverage',
+    'sphinx.ext.viewcode',
+]
+
+# Add any paths that contain templates here, relative to this directory.
+# templates_path = ['_templates']
+
+# The suffix of source filenames.
+source_suffix = '.rst'
+
+# The encoding of source files.
+#source_encoding = 'utf-8-sig'
+
+# The master toctree document.
+master_doc = 'index'
+
+# General information about the project.
+project = 'django-viewflow'
+copyright = '2014, Mikhail Podgurskiy'
+
+# The version info for the project you're documenting, acts as replacement for
+# |version| and |release|, also used in various other places throughout the
+# built documents.
+#
+# The short X.Y version.
+version = '0.1.0'
+# The full version, including alpha/beta/rc tags.
+release = '0.1.0'
+
+# The language for content autogenerated by Sphinx. Refer to documentation
+# for a list of supported languages.
+#language = None
+
+# There are two options for replacing |today|: either, you set today to some
+# non-false value, then it is used:
+#today = ''
+# Else, today_fmt is used as the format for a strftime call.
+#today_fmt = '%B %d, %Y'
+
+# List of patterns, relative to source directory, that match files and
+# directories to ignore when looking for source files.
+exclude_patterns = ['_build']
+
+# The reST default role (used for this markup: `text`) to use for all
+# documents.
+#default_role = None
+
+# If true, '()' will be appended to :func: etc. cross-reference text.
+#add_function_parentheses = True
+
+# If true, the current module name will be prepended to all description
+# unit titles (such as .. function::).
+#add_module_names = True
+
+# If true, sectionauthor and moduleauthor directives will be shown in the
+# output. They are ignored by default.
+#show_authors = False
+
+# The name of the Pygments (syntax highlighting) style to use.
+pygments_style = 'sphinx'
+
+# A list of ignored prefixes for module index sorting.
+#modindex_common_prefix = []
+
+# If true, keep warnings as "system message" paragraphs in the built documents.
+#keep_warnings = False
+
+
+# -- Options for HTML output ----------------------------------------------
+
+# The theme to use for HTML and HTML Help pages.  See the documentation for
+# a list of builtin themes.
+# html_theme = 'default'
+
+# Theme options are theme-specific and customize the look and feel of a theme
+# further.  For a list of options available for each theme, see the
+# documentation.
+#html_theme_options = {}
+
+# Add any paths that contain custom themes here, relative to this directory.
+#html_theme_path = []
+
+# The name for this set of Sphinx documents.  If None, it defaults to
+# "<project> v<release> documentation".
+#html_title = None
+
+# A shorter title for the navigation bar.  Default is the same as html_title.
+#html_short_title = None
+
+# The name of an image file (relative to this directory) to place at the top
+# of the sidebar.
+#html_logo = None
+
+# The name of an image file (within the static path) to use as favicon of the
+# docs.  This file should be a Windows icon file (.ico) being 16x16 or 32x32
+# pixels large.
+#html_favicon = None
+
+# Add any paths that contain custom static files (such as style sheets) here,
+# relative to this directory. They are copied after the builtin static files,
+# so a file named "default.css" will overwrite the builtin "default.css".
+html_static_path = ['_static']
+
+# Add any extra paths that contain custom files (such as robots.txt or
+# .htaccess) here, relative to this directory. These files are copied
+# directly to the root of the documentation.
+#html_extra_path = []
+
+# If not '', a 'Last updated on:' timestamp is inserted at every page bottom,
+# using the given strftime format.
+#html_last_updated_fmt = '%b %d, %Y'
+
+# If true, SmartyPants will be used to convert quotes and dashes to
+# typographically correct entities.
+#html_use_smartypants = True
+
+# Custom sidebar templates, maps document names to template names.
+#html_sidebars = {}
+
+# Additional templates that should be rendered to pages, maps page names to
+# template names.
+#html_additional_pages = {}
+
+# If false, no module index is generated.
+#html_domain_indices = True
+
+# If false, no index is generated.
+#html_use_index = True
+
+# If true, the index is split into individual pages for each letter.
+#html_split_index = False
+
+# If true, links to the reST sources are added to the pages.
+#html_show_sourcelink = True
+
+# If true, "Created using Sphinx" is shown in the HTML footer. Default is True.
+#html_show_sphinx = True
+
+# If true, "(C) Copyright ..." is shown in the HTML footer. Default is True.
+#html_show_copyright = True
+
+# If true, an OpenSearch description file will be output, and all pages will
+# contain a <link> tag referring to it.  The value of this option must be the
+# base URL from which the finished HTML is served.
+#html_use_opensearch = ''
+
+# This is the file name suffix for HTML files (e.g. ".xhtml").
+#html_file_suffix = None
+
+# Output file base name for HTML help builder.
+htmlhelp_basename = 'django-viewflowdoc'
+
+
+# -- Options for LaTeX output ---------------------------------------------
+
+latex_elements = {
+# The paper size ('letterpaper' or 'a4paper').
+#'papersize': 'letterpaper',
+
+# The font size ('10pt', '11pt' or '12pt').
+#'pointsize': '10pt',
+
+# Additional stuff for the LaTeX preamble.
+#'preamble': '',
+}
+
+# Grouping the document tree into LaTeX files. List of tuples
+# (source start file, target name, title,
+#  author, documentclass [howto, manual, or own class]).
+latex_documents = [
+  ('index', 'django-viewflow.tex', 'django-viewflow Documentation',
+   'Mikhail Podgurskiy', 'manual'),
+]
+
+# The name of an image file (relative to this directory) to place at the top of
+# the title page.
+#latex_logo = None
+
+# For "manual" documents, if this is true, then toplevel headings are parts,
+# not chapters.
+#latex_use_parts = False
+
+# If true, show page references after internal links.
+#latex_show_pagerefs = False
+
+# If true, show URL addresses after external links.
+#latex_show_urls = False
+
+# Documents to append as an appendix to all manuals.
+#latex_appendices = []
+
+# If false, no module index is generated.
+#latex_domain_indices = True
+
+
+# -- Options for manual page output ---------------------------------------
+
+# One entry per manual page. List of tuples
+# (source start file, name, description, authors, manual section).
+man_pages = [
+    ('index', 'django-viewflow', 'django-viewflow Documentation',
+     ['Mikhail Podgurskiy'], 1)
+]
+
+# If true, show URL addresses after external links.
+#man_show_urls = False
+
+
+# -- Options for Texinfo output -------------------------------------------
+
+# Grouping the document tree into Texinfo files. List of tuples
+# (source start file, target name, title, author,
+#  dir menu entry, description, category)
+texinfo_documents = [
+  ('index', 'django-viewflow', 'django-viewflow Documentation',
+   'Mikhail Podgurskiy', 'django-viewflow', 'One line description of project.',
+   'Miscellaneous'),
+]
+
+# Documents to append as an appendix to all manuals.
+#texinfo_appendices = []
+
+# If false, no module index is generated.
+#texinfo_domain_indices = True
+
+# How to display URL addresses: 'footnote', 'no', or 'inline'.
+#texinfo_show_urls = 'footnote'
+
+# If true, do not generate a @detailmenu in the "Top" node's menu.
+#texinfo_no_detailmenu = False
diff --git a/docs/core_concepts.rst b/docs/core_concepts.rst
new file mode 100644
index 00000000..1e70dc45
--- /dev/null
+++ b/docs/core_concepts.rst
@@ -0,0 +1,14 @@
+=============
+Core concepts
+=============
+
+Flow and Flow Tasks
+===================
+
+
+Activation
+==========
+
+
+Core django
+===========
diff --git a/docs/examples.rst b/docs/examples.rst
new file mode 100644
index 00000000..dc17f59b
--- /dev/null
+++ b/docs/examples.rst
@@ -0,0 +1,15 @@
+========
+Examples
+========
+
+
+Hello, world
+============
+
+This example demostrate basic flow construction
+
+
+Shipment
+========
+
+Standard BPMN example Shipment Process automated in hundred lines
diff --git a/docs/flow_tasks.rst b/docs/flow_tasks.rst
new file mode 100644
index 00000000..71592d78
--- /dev/null
+++ b/docs/flow_tasks.rst
@@ -0,0 +1,26 @@
+==========
+Flow tasks
+==========
+
+
+Start
+=====
+
+
+View
+====
+
+Job
+===
+
+If
+===
+
+Switch
+======
+
+Split
+=====
+
+Join
+====
diff --git a/docs/index.rst b/docs/index.rst
new file mode 100644
index 00000000..93203dad
--- /dev/null
+++ b/docs/index.rst
@@ -0,0 +1,120 @@
+===============
+django-viewflow
+===============
+
+Ad-hoc business process automation framework for Django
+
+django-viewflow provides simple, django friendly way to organize views, background jobs, user permission checking,
+in one clearly defined task flow.
+
+
+Installation
+============
+
+django-viewflow requires Python 3.3 or grater and django 1.7::
+
+    pip install django-viewflow
+
+And add it into INSTALLED_APPS settings::
+    
+    INSTALLED_APPS = (
+         ...
+         viewflow,
+    )
+
+
+Quick Start
+===========
+
+Let's define basic Hello Process where one could start hello world request, another approve it,
+and when request approved, it should be send in background.
+
+Start with process model definition::
+
+    from django.db import models
+    from viewflow.models import Process
+
+    class HelloworldProcess(Process):
+        text = models.ChatField(max_lenght=150, blank=True, null=True)
+        approved = models.BooleanField(default=False)
+
+        class Meta:
+            permissions = [
+                ('can_start_request', 'Can start hello world request'),
+                ('can_approve_request', 'Can approve hello world request')
+            ]
+
+Define the actual task that would perform Hello on World, in task.py::
+
+    import os
+
+    from celery import shared_task
+    from viewflow.flow import flow_job
+
+    @shared_task(bind=True)
+    @flow_job()
+    def send_hello_world_request(self, activation):
+        with open(os.devnull, "w") as world:
+            world.write(activation.process.text)
+
+
+To make this code works flow definition is simple, put it in `flows.py` inside your django application
+
+.. code-block:: python
+
+    from viewflow import flow
+    from viewflow.base import this, Flow
+    from viewflow.views import ProcessView
+
+    class HelloWorldFlow(Flow):
+        start = flow.Start(StartView, fields=["text"]) \
+           .Permission('helloworld.can_start_request') \
+           .Activate(this.hello_world)
+
+        approve = flow.View(ProcessView, fields=["approve"]) \
+            .Permission('helloworld.can_approve_request')
+            .Next(this.check_approve)
+
+        check_approve = flow.If(cond=lambda p: p.approved) \
+            .OnTrue(this.send) \
+            .OnFalse(this.end)
+
+        send = flow.Job(send_hello_world_request) \
+            .Next(this.end)
+
+        end = flow.End()
+
+`Flow` class contains all url required for task processing::
+
+    from django.conf.urls import patterns, url, include
+    from .flows import HelloWorldFlow
+
+    urlpatterns = patterns('',
+        url(r'^helloworld/', include(HelloWorldFlow.instance.urls)))
+
+
+That's all you need to setup this flow.
+
+Next, you can see how to define custom views `TODO` meet with and other concepts `TODO` of django-viewflow
+
+More examples available in `tests\\examples` directory
+
+
+
+Contents:
+=========
+
+.. toctree::
+   :maxdepth: 2
+
+   core_concepts
+   flow_tasks
+   examples
+
+
+Indices and tables
+==================
+
+* :ref:`genindex`
+* :ref:`modindex`
+* :ref:`search`
diff --git a/tox.ini b/tox.ini
index 96fa94d5..cac61d75 100644
--- a/tox.ini
+++ b/tox.ini
@@ -10,4 +10,3 @@ deps = -r{toxinidir}/requirements.txt
        psycopg2
        git+https://github.com/philipaxer/pygraphviz
        ipdb
-
diff --git a/viewflow/flow/end.py b/viewflow/flow/end.py
index c10d8cdd..7e068a69 100644
--- a/viewflow/flow/end.py
+++ b/viewflow/flow/end.py
@@ -18,4 +18,3 @@ def __init__(self):
 
     def _outgoing(self):
         return iter([])
-
diff --git a/viewflow/flow/gates.py b/viewflow/flow/gates.py
index fe050710..fc35fa9d 100644
--- a/viewflow/flow/gates.py
+++ b/viewflow/flow/gates.py
@@ -23,6 +23,11 @@ def activate_next(self):
 class If(Gateway):
     """
     Activates one of paths based on condition
+
+    Example
+       check_decision = flow.If(lambda p: p.approved) \
+           .OnTrue(this.approved)
+           .OnFalse(this.end)
     """
     task_type = 'IF'
     activation_cls = IfActivation
@@ -191,6 +196,12 @@ def activate(cls, flow_task, prev_activation, token):
 class Join(Gateway):
     """
     Wait for one or all incoming links and activate next path
+
+    Join should be connected to one split task only
+
+    Example:
+        join_on_warehouse = self.Join() \
+            .Next(this.next_task)
     """
     task_type = 'JOIN'
     activation_cls = JoinActivation
@@ -235,6 +246,11 @@ def activate_next(self):
 class Split(Gateway):
     """
     Activate outgoing path in-parallel depends on per-path condition
+
+    Example:
+        split_on_decision = flow.Split() \
+            .Next(check_post, cond=lambda p: p,is_check_post_required)
+            .Next(this.perform_task_always)
     """
     task_type = 'SPLIT'
     activation_cls = SplitActivation
diff --git a/viewflow/flow/job.py b/viewflow/flow/job.py
index 828080b2..26a47023 100644
--- a/viewflow/flow/job.py
+++ b/viewflow/flow/job.py
@@ -8,6 +8,21 @@
 
 
 def flow_job(**lock_args):
+    """
+    Decorator that prepares celery task for execution
+
+    Makes celry job function with following signature:
+             :: (flow_task-strref, process_pk, task_pk, **kwargs)
+
+    Expects actual celery job function have following signature
+             :: (activation, **kwargs)
+    If celery task class implements activation interface, job function
+    called without activation instance
+             :: (activation, **kwargs)
+
+    Process instannce are locked only before and after function execution.
+    Plese avoid any process state modification during the celery job
+    """
     class flow_task_decorator(object):
         def __init__(self, func, activation=None):
             self.func = func
@@ -69,6 +84,10 @@ def __get__(self, instance, instancetype):
 class Job(Task):
     """
     Task that runs in background
+
+    Example:
+        job = flow.Job(task.job) \
+            .Next(this.end)
     """
     task_type = 'JOB'
     activation_cls = JobActivation
diff --git a/viewflow/flow/start.py b/viewflow/flow/start.py
index ae2dc430..4cee5081 100644
--- a/viewflow/flow/start.py
+++ b/viewflow/flow/start.py
@@ -91,7 +91,7 @@ def prepare(self, data=None):
 
 class StartViewMixin(object):
     """
-    Mixin for start views, not implementing activation
+    Mixin for start views, that not implements activation interface
     """
     def get_context_data(self, **kwargs):
         context = super(StartViewMixin, self).get_context_data(**kwargs)
@@ -121,6 +121,9 @@ def dispatch(self, request, activation, **kwargs):
 
 
 class StartView(StartViewActivation, UpdateView):
+    """
+    Generic start view
+    """
     fields = []
 
     @property
@@ -159,6 +162,11 @@ def dispatch(self, request, *args, **kwargs):
 class Start(Event):
     """
     Start process event
+
+    Example:
+        start = flow.Start(StartView, fields=["some_process_field"]) \
+            .Available(lambda user: user.is_super_user) \
+            .Activate(this.first_start)
     """
     task_type = 'START'
     activation_cls = StartViewActivation
diff --git a/viewflow/flow/view.py b/viewflow/flow/view.py
index c707c6c2..7df328ef 100644
--- a/viewflow/flow/view.py
+++ b/viewflow/flow/view.py
@@ -99,7 +99,7 @@ def prepare(self, data=None):
 
 class TaskViewMixin(object):
     """
-    Mixin for task views, not implementing activation
+    Mixin for task views, that not implements activation interface
     """
     def get_context_data(self, **kwargs):
         context = super(TaskViewMixin, self).get_context_data(**kwargs)
@@ -175,6 +175,14 @@ def dispatch(self, request, *args, **kwargs):
 
 
 class View(Task):
+    """
+    View task
+
+    Example:
+        task = flow.View(some_view) \
+            .Permission('my_app.can_do_task') \
+            .Next(this.next_task)
+    """
     task_type = 'HUMAN'
     activation_cls = TaskViewActivation
 
@@ -216,7 +224,7 @@ def Assign(self, owner=None, **owner_kwargs):
         accepts user lookup kwargs or callable :: Process -> User
 
         .Assign(username='employee')
-        .Assign(lambda task: task.process.created_by)
+        .Assign(lambda process: process.created_by)
         """
         if owner:
             self._owner = owner
@@ -230,7 +238,7 @@ def Permission(self, permission, assign_view=None):
         aceps permissions name of callable :: Process -> permission_name
 
         .Permission('my_app.can_approve')
-        .Permission(lambda task: 'my_app.department_manager_{}'.format(task.process.depratment.pk))
+        .Permission(lambda process: 'my_app.department_manager_{}'.format(process.depratment.pk))
         """
         self._owner_permission = permission
         self._assign_view = assign_view