Ok. This is a pre-report cause I haven't played anything yet but I wanted to comment it before I do. As Chris states this is the stuff!!! This is the reason why I started to buy jazz courses even though I know for sure I won't probably jam with other jazz cats, but I realized this:
Knowing this stuff will open doors for better composing, better arranging and start to learn jazz itself!
I'm happy to find this hidden lesson cause this is the core lesson of the first part in Mimi Fox's Jazz Anatomy (just in case if anyone didn't noticed it) . Sir Hackalock is right this is not something you will instantly learn from a4 page article. You will need to learn and re learn it, to live it and if it's possible try to have more cool resources at hand like TF courses,books or dvds:
( by the way here's where Ted Greene 'Chord Chemistry' comes as a rescue. This book has a complete section of Jazz Blues and substitutions which is essential in order to advance in this topic. Don Mock has an excellent DVD about this stuff (Rhythm Jazz Chops) and I love Joe Pass's Solo Guitar and Jazz Blues DVD's where he explains this principles in a friendly way).
I'll check this out in detail and comment my progress.see you later.