XHTML is a combination of HTML and XML (EXtensible Markup Language).
XHTML consists of all the elements in HTML 4.01, combined with the strict syntax of XML.
Many pages on the internet contain "bad" HTML.
The Below HTML code will work just fine if you view it in a browser (even if it does NOT follow the HTML rules):
XML is a markup language where everything must be marked up correctly, which results in "well-formed" documents.
XML is designed to describe data, and HTML is designed to display data.
Today's market consists of different browser technologies, some browsers run on computers, and some browsers run on mobile phones or other small devices. The last-mentioned do not have the resources or power to interpret a "bad" markup language.
Therefore - by combining the strengths of HTML and XML, W3C recommended a markup language that is useful now and in the future - XHTML.
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