Html notes (10)XHTML XML_html/css_WEB-ITnose

XHTML is Extensible HyperText Markup Language. XHTML was launched by the w3c organization in 2000 to enhance HTML. It was originally intended to replace HTML, but it was found that there were too many web pages written in HTML on the Internet, so it failed! It can be understood that it is an upgraded version of HTML (HTML 4.01). The code structure of XHTML is more rigorous and it is an application based on XML. XML is Extensible Markup Language (Extensible Markup Language) XML is a description of data information. HTML is the description of the data display. XML codes are more strict, for example: tags that do not end are considered errors. The XML specification can be interpreted by more applications and will become a universal data exchange language. Each server and framework uses XML as a configuration file