Description of problem: The CMS dev guide only has 'MORE NEEDED HERE' for all of the sections in chapters 2 and 3. These chapters give the overview and high level concepts - in other words the background for the rest of the document. These are crucial chapters for anyone learning about the system for the first time - or indeed trying to get more deeply into understanding the system. In other words these missing chapters are crucial for the target audience of this dev guide.
Closing old tickets