Thank you very much but actually all these links point to the documentation of the trunk version not the stable version 7.

http://openerp.co.za/7/users/user.html for v 7

Thank you but this is mainly the functional documentation, I am interested in the technical one.

https://www.openerp.com/files/memento/OpenERP_Technical_Memento_latest.pdf. You can also take help from : http://www.ibcscorp.com/openerp-custom-module-development-quick-start-guide/