Suggestions for CCDA basics?

I was reading this article and I started to get lost in the sauce since I'm new to CCDA. I was wondering if you all had some recommendations for digging into some of the basics needed in order to assimilate this? For instance where it says "Some of the built-in logic for handling CCDAs is controlled by the IHE header....There is little visibility into this process in the product documentation." Are there examples or places where you have been able to find some insight into this sort of thing or maybe this is something that comes with experience?