This may sound like a silly question, but is there any technical top-down documentation that explains how WordPress works?
There's a lot of "How to..." style documentation, i.e. explaining how to get a certain thing (install, write a theme,...) done, but I have trouble finding any documentation that provides the bigger picture, explaining how WordPress interacts with the web server, what major components/concepts exist, how they are organized in the install and how they work together to create the delivered web pages.
I guess, if I follow enough links on Plugins, Themes, Templates, ... I'll eventually get a (hopefully) fairly complete picture, but I'd much prefer starting with high level documentation and then drill down in areas that are immediately relevant to me.