Although XSLT is a very big topic that can't possibly be covered in a single chapter, you have been exposed to some of the more important aspects of the language that will get you started transforming XML documents in ASP.NET applications. XSLT provides a cross-platform, language-independent solution that can used to transform XML documents into a variety of structures.
The .NET platform provides several classes developed specifically for doing XSLT transformations, including the XslTransform and XPathDocument classes. By using these and other classes, you have the ability to leverage the complete XSLT language in your ASP.NET applications.
In the next chapter, you'll be provided with an in-depth look at the different XML features found in ADO.NET.