Target domain: Ruby on Rails

I've tacitly been thinking about Web apps in terms of PHP and perhaps jQuery, but really, to be honest, I'd be a fool not to look at different platforms, now wouldn't I?

So here's a very interesting roadmap for learning Ruby on Rails. Here's what I like about this: it takes the semantic subdomains needed to plan (or understand) a Web app, and lays them out. A similar thing could be done for other approaches and platforms - and that result would be the semantic map for the domain.

That is what semantic programming is about.