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In this chapter, you meet the first technologies you need to learn in order to write web pages: HTML and XHTML. In fact, what you will really be learning is XHTML—although I will be explaining the differences between HTML and XHTML as we go along. (As I already mentioned, you can consider XHTML simply to be the latest version of HTML.)
The main goal of this chapter is to demonstrate how the primary role of XHTML is to describe the structure of your documents.