Adding authorship information to MediaWiki pages
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From the page
Saved with the link. Notes from 2007 to 2016 are mostly the page's own words, so this is probably an excerpt.
The perhaps most visible example of search engines starting to look for semantic data is the author information in Google search results, such as shown in the image above. Here is how we made pages like that one (a ginger bread recipe) on Ssongsmat.nu appear with author information in Googles search results.