Research: data: keepachangelog

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 * Ontologies and how to deal with lists.
 * Standards: schema.org, microdata, microformats, json, yaml, csv, dot, vcard.
 * Intelligence: how to easilly search, index and produce outputs with strutured data?
-* Samples: TODO and ChangeLog (see [yankee: Changelogs meet YAML](https://github.com/studio-b12/yankee)).
+* Samples: TODO and [ChangeLog](http://keepachangelog.com) (see [yankee: Changelogs meet YAML](https://github.com/studio-b12/yankee)).
 
 ## Software