XML data that conforms to the rules of XML syntax. There is typically little or no tolerance for straying from any electronic standard. However, HTML, the tag-based format language created prior ...

In this article, Lamont Adams gives an introduction of XML and its basic syntax. Whatever the reason, you're lacking in XML savvy and want to remedy the situation. Well, you're in the right place.

To enforce structure requirements for an XML document, you have to turn to one of XML's attendant technologies, data type definition (DTD). And that's the subject of this article.