I'm take it you know where these definitions are, and how I find all the relevant docs - I just do not have the time to trawl the website looking for them. It really is unecessarily difficult.
Very difficult, indeed, and I must admit I'm still at sea myself, although things are gradually becoming clearer. What helps me a lot is the
cross-reference table. It's hidden on the Flight Standards site under 'Progress'/'Air operations'/'Cross reference table'.
As for those websites without a search function, I would simply use Google and limit the search to the relevant site. Entering "site:URL" after the search terms tells Google to do so.