EXAMPLE USAGE: Super-easy method to say you like the band Coldplay: <#me> like:likes . Or providing a rating (between 0.0 and 5.0): <#me> like:opinion [ a like:Opinion ; like:regarding ; rev:rating 4.5 ] . Here, no rating is provided, but all PositiveOpinions have a rating of more than 3.0 by definition: <#me> like:opinion [ a like:PositiveOpinion ; like:regarding ] . This, however, means you like the Wikipedia article about Coldplay, but doesn't indicate whether or not you like the band: <#me> like:likes . This vocab provides a "like:likes_topic_of" term for linking to articles. It's a little ambiguous - the following could mean that I like the Wikipedia article about Coldplay, or that I like the band themselves - or perhaps both! <#me> like:likes_topic_of .