This is a handy 180 page reference source that defines and explains all of the tags, events, and associated attributes that compose XHTML (eXtensible Hyper Text Markup Language, version 1.0. This Quick Reference also includes useful, real world, working examples of code for each tag. In addition, there are write-ups, with code examples, for the 17 events and another 7 attributes that are commonly available to many tags.
DevGuru XHTML Quick Reference Guide 
