The difference between XHTML and HTML

1. The rules apply to XHTML, but do not apply to HTML

• The xmlns attribute of the
• All elements must end
• All labels must be lowercase
• Any attribute value is caused by single or double quotation marks.
• All properties must have a value
• The "&" symbol must be encoded, that is, because it is written as "&amp", the "&amp" should be written in both the body and the URL.

The difference between XHTML and HTML