Semantic HTML and Search Engine Optimization
http://dev.opera.com/articles/view/semantic-html-and-search-engine-optimiza/

De Valk, Joost
Opera
2008

Abstract:

So what is POSH? No, it's not just some new clothing fashion hype amongst web designers - POSH is the acronym for Plain Old Semantic HTML. The term Semantic HTML is used for a variety of things, but it has it's origin in one objective: creating (X)HTML documents using semantic elements and attributes, as opposed to using presentational HTML.