HTML vs. XHTML differences

As a matter of fact. XHTML is not much different from the HTML 4.01 standard. They are the most basic differences. Examples include the following: 1. XHTML elements must be nested correctly.
Error: <p><span>this is example.</p></span> correct: <p><span>this is Example.</span The ></p>2.xhtml element must be closed. Error: <p>this is example. Correct: <p>this is example.</p>3. The label name must be in lowercase letters. Error: <p>this is example.<p> correct: <p>this is example.</p>3.1 empty label must also be closed error:<br> correct:<br/> A 4.XHTML document must have a root element. All XHTML elements must be nested within the 

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HTML vs. XHTML differences