For example: <u>This browser also knows the ending character without ending character
Shtml is based on Server Side Include(ssi). When there are server-side executable scripts, it is regarded as a dynamic programming language. It can include. When server-side scripts are not included, there is no difference between it and html.
xhtml basic w3c standard, which follows the strict xml format, can be considered a transition from html to xml, with strict syntax format requirements.
xhtml<p>must have the ending character (all elements must be closed)
xhtml<p><strong></strong></p>(correctly nested)
xhtml attributes should be enclosed in double quotes
xhtml is case sensitive, and the properties and values of the tag are lowercase
xhtml replaces name attribute with id