Chapter 15: Page 301 - 'A Complex Action Button'
At the top of page 301, there is a code block that includes the UI definition, standard in any XML file. Unfortunately a line was cut off at the end of this block which begins the definition of the button in question. That block of code should read as follows:
<Ui xmlns="http://www.blizzard.com/wow/ui/" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.blizzard.com/wow/ui/ ..\FrameXML\UI.xsd"> <Button name="QuickCasterButton" inherits="ActionButtonTemplate,SecureActionButtonTemplate">