This book was started just a few days before Drupal 7 was released in its first stable version. At that point, there were many modules (plugins) available in more or less stable versions, and many more were waiting on the starting blocks for their Drupal 7 versions. The examples in this book are based on what was available when the book was written, although a few cases also describe functionality expected to be available at the time of the release of this book.

It is likely that many of these issues will be solved when you read this book.

TIP: Since this book is now in the Drupal community documentation, you are free to update and improve the book.