It's a good exercise to explore these files and to understand what they do; not only as a way of learning and getting better acquainted with the formatting, but also as a way of being able to explain behavior that you didn't understand, or were not aware of. For example, at the beginning of the chapter, we mentioned OWA and how UAG removes the default Sign out button from it so that the user will use UAG's Log Off button. This is achieved with the following function:
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This may not make much sense in its current form, because the text is encoded using Base64, but in principal you should able to see how this function is used to search for some text, and replace it with another. The thing to watch out for here is that XML files are text-based and some of the special characters used to make up the structure of these files, are also commonly found in HTML and Java. This means that whatever you define inside your tags as values, will be treated literally...