Sams Teach Yourself XML in 21 Days

Sams Teach Yourself XML in 21 Days

By Steven Holzner

Part I: At a Glance

Creating XML Documents

Part I provides an overview of XML and many of the popular ways it's used. You'll take a look at the various markup languages that have been created using XML and how they work.

You'll also begin creating your own XML documents in this part, and in the process you'll get all the basics down. you're going to see how to create both well-formed and valid XML documents.

Well-formed documents obey a number of rules, and before an XML document can be considered "official," it must be well-formed. To be valid, an XML document must specify a set of syntax rules, and XML processors can use these rules to check whether that document adheres to those rules. You're going to see the two ways of specifying the syntax of XML documents in this part—by using document type declarations (DTDs) and XML schemas.

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