This question is kind of apropos of nothing, but I noticed that one of the example documents [1] has a weird markup structure, lacking tags like HEAD, BODY, etc. Is this just one of those weird accidental things or is this an intentional technique? It kind of reminds me of the dark old days of IE6 workarounds.

Probably a dumb question but I don't keep up on client-side technology as much as I should so I was curious.

http://shutterstock.github.com/rickshaw/examples/y_axis.html