As readers of this blog will know, the About Roman Emperors dataset is built upon the backbone of Wikipedia. More specifically, HTTP URIs like http://dbpedia.org/resource/Nero are programmatically created by the dbpedia project on the basis of Wikipedia content, and I used them to identify uniquely each emperor. Web pages and other resources about those emperors are then linked -- using FOAF and other vocabularies -- with those identifiers. These little packages of data about the emperors and their web pages are serialized in both HTML and RDF form on my website.
See what you think.