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Backbase 4 RIA Development by Sergey Ilinsky, Ghica van Emde Boas

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The Backbase XML Execution Language (XEL)

The Backbase Client Framework offers XEL, an XML markup language, which can be used in many circumstances as an alternative to JavaScript. This section will introduce you to the main XEL elements.

Before we turn our attention to XEL itself, let us try to clarify when you should use JavaScript and when you should use XEL. Remember that we showed two versions of the "Hello Backbase" balloon example in Chapter 1. In both cases, they used an XEL event handler tag to describe what should happen in case the user clicks on the OK button. In the first example, the content of the element was coded in JavaScript and in the second example we used XEL. This suggests that you can use XEL or JavaScript interchangeably. ...

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