Reply to Beginners guide to midi mapping - does this exist?

Hi all,
I have been searching online for a guide to explain midi mapping to me, but I have not found anything helpful.
I am not looking for anything specific to any one controller, but more a general guide so I can understand the principals of it.
I have lots of basic questions, for example, what is the difference between "note" "cc" and "bend" ?
Stuff like that.
Any guidance would be appreciated.
Thanks, P