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XHTML is a separate language that began as a reformulation of HTML 4.01 using XML 1.0. It continues to be developed:
XHTML 1.0, published January 26, 2000 as a W3C Recommendation, later revised and republished August 1, 2002. It offers the same three flavors as HTML 4.0 and 4.01, reformulated in XML, with minor restrictions.
XHTML 1.1, published May 31, 2001 as a W3C Recommendation. It is based on XHTML 1.0 Strict, but includes minor changes, can be customized, and is reformulated using modules from Modularization of XHTML, which was published April 10, 2001 as a W3C Recommendation.
XHTML 2.0, is still a W3C Working Draft. XHTML 2.0 is incompatible with XHTML 1.x and, therefore, would be more accurate to characterize as an XHTML-inspired new language than an update to XHTML 1.x.
XHTML5, which is an update to XHTML 1.x, is being defined alongside HTML5 in the HTML5 draft.
HTML Element
Consider the following example :-
This is an HTML element:
The HTML element starts with a start tag: <b> The content of the HTML element is: This text is bold The HTML element ends with an end tag: </b>
The purpose of the <b> tag is to define an HTML element that should be displayed as bold.
This is also an HTML element:
This HTML element starts with the start tag <body>, and ends with the end tag </body>.
The purpose of the <body> tag is to define the HTML element that contains the body of the HTML document.
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