XML.com FAQs > A. General questions
Question:  A.4 What is HTML?

HTML is the HyperText Markup Language (RFC 1866), a small application of SGML used on the Web.

It defines a very simple class of report-style documents, with section headings, paragraphs, lists, tables, and illustrations, with a few informational and presentational items, and some hypertext and multimedia. See the question on extending HTML. There is also an XML version of HTML.

This FAQ is from The XML FAQ, maintained by Peter Flynn