HTML DTD

HTML DTD stands for Hypertext Markup Language Document Type Definition. Document Type Definition is a specific markup language that is written using SGML (Standard Generalized Markup Language).

URLs:

HTML as an Application of SGML

Explains what all these acronyms mean and accomplish.

All elements in HTML 2.0 DTD

Lists all the elements (vocabulary) used in HTML 2.0 DTD

The Hierarchy of the HTML 3.0 DTD

A technical example of HTML 3.0 DTD

A Beginner's Guide to HTML

Exactly what it says it is, this primer was written by Marc Andressen (who unleashed Web browsers on the world).

W3E References:

HTML

SGML

markup

markup language

Print References:

• The HTML Sourcebook. Ian Graham, John Wiley & Sons, 1995 (ISBN 0-471-11849-4)
• HTML for Dummies. Ed Tittel. IDG, 1995 (ISBN1-568-84330-5)

Detail:

HTML is an SGML DTD. DTD applies SGML to the markup of certain documents. "Markup" is the term used for the process of encoding text for a computer--it makes the text more explicit. By doing so, it helps the computer understand what the text is trying to say, as punctuation marks do in the English language. All SGML documents have data characters and markup. The markup describes the structure of the text and indicates how the data is to be interpreted.

There are three parts in SGML specification: an SGML declaration, a prologue, and an instance. DTD is the prologue section of the specification.