By communication patterns we mean to describe how messages flow in the application.
The picture below that describes communication patterns is created by Phil Leggetter. Phil is a well known name on the real-time communication scene. Phil is a great colleague in business and we have great respect for his knowledge and expertise.
Most frameworks offer a single communication pattern. XSockets offer all of them, but to tell the truth you have to do some custom hacking for the DataSync pattern.
Each pattern and how you use it will be described under the sections named after each pattern.