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Goals of This Chapter
Branching Elements of XSLT
Invoking Templates by Name
Parameters
Variables
Using Recursion to Do Most Anything
A Stylesheet That Emulates a for Loop
A Stylesheet That Generates a Stylesheet That Emulates a for Loop
Summary
So far, we've done some straightforward transformations and we've been able to do some reasonably sophisticated things. To do truly useful work, though, we'll need to use logic in our stylesheets. In this chapter, we'll discuss the XSLT elements that allow you to do just that. Although you'll see several XML elements that look like constructs from other programming languages, they're not exactly the same. As we go along, we'll discuss what makes XSLT different and how to do common tasks with your stylesheets.
By the end of this chapter, you should:
Know the XSLT elements used for branching and control
Understand the differences between XSLT's branching elements and similar constructs in other programming languages
Know how to invoke XSLT templates by name and how to pass parameters to them, if you want
Know how to use XSLT variables
Understand how to use recursion to get around the "limitations" of XSLT's branching and control elements
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| 3.6. Summary |  | 4.2. Branching Elements of XSLT |
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