Rating: 

For years I have relied exclusively on online references for tag & object references. Like Danny Goodman's introductory commentary on finding these references - even the official ones - often lacking and typically inaccurate on practical browser compliance.

Definitive reference fits this title to a "T". Every tag is covered in detail, providing practical description for both the tag and every property along with a practical example. This is most definitely a must have for any developer dealing with dynamic HTML, which is increasingly an important part of site development.

If you are a beginner, don't look for this to teach you how to get started; this is a reference not a primer. That said, find yourself a great introductory title and absolutely purchase this along with it. As you start writing code, you will need this to understand the new tags you are using as well as know how to deal with browser compatibility issues.