Schema.org

Recently, the three major search engins (Bing/Yahoo and Google) agreed on using the microdata system Schema.org. This allow any website to provide semantic information to the search spiders. For instance, you can specify what kind of content you are publishing, like a recipe of an apple pie, or a movie review. More than that, depending on the type, you can give the various important information directly to the search robot : what is the movie title, what is its director, or how long you should cook your pie. »