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Extensible HyperText Markup Language

<hypertext, standard, World-Wide Web> (XHTML) A reformulation of HTML 4.01 in XML.

Being XML means that XHTML can be viewed, edited, and validated with standard XML tools.

At the same time, it operates as well as or better than HTML 4 in existing HTML 4 conforming user agents.

The most important change is that all elements must be terminated, either with a closing tag or using the <TAG.../> shorthand.

So, instead of

<input type=submit>

you would write

<input type="submit" />

The space before the "/" is required by some older browsers. Other differences are that tag and attribute names should be lower case and all attributes should be quoted.

XHTML Home (

Quick Summary (

Latest version: 1.0 Second Edition 2002-08-01, as of 2004-03-16.

< Previous Terms Terms Containing Extensible HyperText Markup Language Next Terms >
Extended Tiny
Extended Video Graphics Array
eXtended Video Graphics Array
extensible database
Extensible Markup Language
Extensible Shell
Extensible Stylesheet Language
Extensible Stylesheet Language Transformations
Extensible VAX Editor

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