Via Dave Beckett in #swig IRC, Manu Sporny’s handy 10 minute overview of RDFa Basics (see also other versions, source materials).
Here’s a screen grab of the full FOAF example used. Note that the WG renamed ‘instanceof’ to ‘typeof’ recently.
For the video-averse, a full transcript is available. Here’s the full XHTML markup example from the above [...]