This has been around a while, but is new to me: Meta data profiles in HTML 4. I spotted a great example in the wild at Tantek Çelik’s weblog, this is it: <head profile="[profile.html](http://tantek.com/log/2003/profile.html)">. Here, the profile expands on the meaning of the various class attributes in use, and adds a few new values for the rel attribute.