We have tested and verified the information in this book to the best of our ability, but you may find that some software features have changed over time or even that we have made some mistakes. As a reader, you can help us to improve future editions of this book by sending us your feedback. Let us know about any errors, inaccuracies, bugs, misleading or confusing statements, and typos that you find anywhere in this book.

Also, please let us know what we can do to make this book more useful to you. We take your comments seriously and will try to incorporate reasonable suggestions into future editions. You can write us at:

To ask technical questions or to comment on the book, send email to:

The web site for XML Hacks offers a ZIP archive of example files, as well as errata, a place to write reader reviews, and much more. You can find this page at:

For more information about this and other books, see the O’Reilly web site: