Footnotes
Section 1
1 There are other, equally valid, interpretations of the acronym RSS.
2 You must register with Yahoo! to obtain a developer’s ID to use the web service. If you don’t want to do that, the hosted version of the application reads from an XML file instead of accessing the on line web service.
Section 2
3 You may already be familiar with Java’s JNI—the Java Native Interface. The GWT’s JSNI is a clever take, both in name and in deed, of the JNI.
Section 3
4 UIObject is the superclass of Widget.
Section 6
5 The Address Book application does not implement a true closure because the state of the callstack is not retained, but the effect is much the same as a true closure.
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