Sams Teach Yourself XML in 24 Hours

Hour 6. Attribute Lists and Writing Correct DTDs

In Hour 5, the basic features of a Document Type Definition (DTD) were examined. This hour will expand on that topic.

The elements in a DTD can be qualified by associating additional data items with them. These data items are known as attributes, and there can be more than one per element. Therefore, they'll be referred to as attribute lists. This hour starts with a large exercise on the inclusion of attribute lists associated with the elements of a DTD. The structure, organization, and types of attributes are all examined. The hour will close with brief remarks on processing instructions (PIs) and references to external resources. A processing instruction gives the XML processor information about ...