In 2013, The European Advisory Board on Cat Diseases (ABCD) published an article about cat vaccination, and the various approaches that can be taken to make the process inclusive for all cats - whether they be indoor/outdoor, rescue shelter cats or from breeding catteries.
Their report gave detailed insight into the four distinct 'lifestyles' our feline friends can enjoy, and how vaccination protocol should be appropriated to the lifestyle, geographical location and disease risks in each kitty patient.
Now, in 2015, they've updated their vaccination guidelines to include current and, where relevant, expanded recommendations. You can read the full report in pdf. format right here.