Patterns are sets of memorized motions that must be performed in a prescribed order and way. The performance of a pattern is judged by how close the movements come to perfection as defined by a specific martial art, organization, school, or instructor. Most, but not all, martial arts use patterns as a training tool. If used correctly, patterns are useful tools in building the mental and physical skills needed to be a martial artist.
Fundamentals. What patterns are and their history.
Performance. How to perform patterns properly.
Sets. What pattern set are and some examples.