<http://schema.org/topics>
"beginner,design,Dev &amp; Design,developers,features,Open Source Lists,programming,Programming and Web Development Lists,Ruby on Rails,ruby,ruby tips series,web development,Web Development Series"^^<http://www.w3.org/2001/XMLSchema#string>
<http://mashable.com/2011/01/14/ruby-on-rails-for-beginners/>