This chapter introduces you to XML. It tells you the why and what: Why
was XML developed and what is XMLgood at? Before we turn to how
to use XML, we need to understand whether XML is an answer to your
problems.
In this chapter, you will learn the essential concepts behind XML:
•which problems XML solves; in other words, what is XML good at;
•what is a markup language and what is the relationship between
XML, HTML, and SGML;
•how and why XML was developed;
•typical applications of XML, with examples;
•the benefits of using XML when compared to HTML. Where is XML
better than HTML?
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