CSS selectors as superpowers

Continuing some of the discussion on flexible processing of markup, 
here's a piece I think is a key part of the stack.  Pattern matching, 
which can link presentation, behavior, and other information to documents.

<http://programming.oreilly.com/2013/05/css-selectors-as-superpowers.html>

If you hate CSS, you can read "a streamable subset of XPath" for it if 
you prefer - at least in the abstract. You can similarly read 
"markup-processing application" if the browser ain't your thing.

Markup is beautifully optimized for pattern matching approaches.

Thanks,
-- 
Simon St.Laurent
http://simonstl.com/