--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/doc/book/en/devrepo/dataimport.rst	Fri Dec 14 14:08:14 2012 +0100
@@ -0,0 +1,58 @@
+. -*- coding: utf-8 -*-
+
+.. _dataimport:
+
+Dataimport
+==========
+
+*CubicWeb* is designed to manipulate huge of amount of data, and provides helper functions to do so.
+These functions insert data within different levels of the *CubicWeb* API,
+allowing different speed/security tradeoffs. Those keeping all the *CubicWeb* hooks
+and security will be slower but the possible errors in insertion
+(bad data types, integrity error, ...) will be raised.
+
+These dataimport function are provided in the file `dataimport.py`.
+
+All the stores have the following API::
+
+    >>> store = ObjectStore()
+    >>> user = store.create_entity('CWUser', login=u'johndoe')
+    >>> group = store.create_entity('CWUser', name=u'unknown')
+    >>> store.relate(user.eid, 'in_group', group.eid)
+
+
+ObjectStore
+-----------
+
+This store keeps objects in memory for *faster* validation. It may be useful
+in development mode. However, as it will not enforce the constraints of the schema,
+it may miss some problems.
+
+
+
+RQLObjectStore
+--------------
+
+This store works with an actual RQL repository, and it may be used in production mode.
+
+
+NoHookRQLObjectStore
+--------------------
+
+This store works similarly to the *RQLObjectStore* but bypasses some *CubicWeb* hooks to be faster.
+
+
+SQLGenObjectStore
+-----------------
+
+This store relies on *COPY FROM*/execute many sql commands to directly push data using SQL commands
+rather than using the whole *CubicWeb* API. For now, **it only works with PostgresSQL** as it requires
+the *COPY FROM* command.
+
+The API is similar to the other stores, but **it requires a flush** after some imports to copy data
+in the database (these flushes may be multiples through the processes, or be done only once at the
+end if there is no memory issue)::
+
+    >>> store = SQLGenObjectStore(session)
+    >>> store.create_entity('Person', ...)
+    >>> store.flush()