ITIL® v3 - The Official ITIL Lifecyle Publication Suite
ITIL v3 (2007 Edition) represented a paradigm shift in the way the ITIL methodology for delivering IT services was organised. Gone are the days when the focus was purely on process, instead a more holistic approach being taken to IT services through a lifecycle approach.
In the summer of 2011 ITIL was revised and updated with 2011 Edition being released. The 2011 edition of the framework added extra guidance in Service Strategy but mainly just aimed to add clarity and completeness where v3 had begun.
Read more about ITIL 2011.