November 2000
Intermediate to advanced
384 pages
8h 8m
English
Content preview from XHTML by Example
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Chapter 13. Document Type Definitions—The Syntax Rulebook
Every markup language has a set of rules that must be followed for a document to conform to the language. The XHTML language is defined in a set of three documents known as Document Type Definitions, or DTDs. You've used DTDs already by incorporating the document type declaration in your XHTML pages, and you've checked your authoring work against the DTD using the validation service.
As XHTML begins to incorporate advanced features such as Modularization, Web authors will hold an advantage if they are comfortable working with DTDs. At a minimum, you should be able to read a DTD, if not actually author your own.
This chapter teaches you:
The syntax used to write DTDs
How to declare an element ...
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