An introductory guide to to structured markup for SEO (search engine optimization).
Provides a brief overview of semantic web technologies, reviews the different types of structured markup (microformats, microdata and RDFa) consumed by Google and other search engines, and explores different which format is right for which topical domains.
Because of its particular relevance for search engine optimization, the microdata vocabulary schema.org is the focus of examples.
For accompanying notes and additional links see my blog post on this presentation:
Clipping is a handy way to collect important slides you want to go back to later.