On Monday evening, I presented a deck at searchABLE.1 looking at the importance of semantic HTML. It touched on the history of the web, Geocities, Microformats and Schema, and how each of these elements has shaped (and continues to shape) our digital landscape. This has some pretty big conceptual and practical implications for SEO (and the wider web) both in the immediate and long-term future.
Enjoy!
Update (09/04/12): There's a follow-up guest post on the ionSearch blog which explores some of the ideas and content of the presentation in some (a lot) more depth.
Trouble viewing this slideshow? Try over at SlideShare.

By The (R)evolution of Semantic Search August 9, 2012 - 8:17 am
[...] HTML has always allowed for grammatical, contextual structure with code; offering different tags for different meanings. The evolution of the web at large meant that the semantic power of HTML was lost through early design restrictions and HTML was broken up and altered for presentation purposes as opposed to creating semantically structured, meaningful code (for a really thorough and digestible explanation, see What’s the big deal about Semantic HTML) [...]