XHTML is a stricter and cleaner version of HTML.
What Is XHTML?
XHTML stands for EXtensible HyperText Markup Language
XHTML is almost identical to HTML 4.01
XHTML is a stricter and cleaner version of HTML
XHTML is HTML defined as an XML application
XHTML is a W3C Recommendation
W3Schools Home: XHTML is a stricter and cleaner version of HTML.
In this tutorial you will learn the difference between HTML and XHTML. We will also show you how W3Schools.com was converted into XHTML.
Start learning XHTML now!
XHTML (eXtensible HyperText Markup Language) is a family of XML markup languages that mirror or extend versions of the widely-used Hypertext Markup Language (HTML), the language in which web pages are written.
While HTML (prior to HTML5) was defined as an application of Standard Generalized Markup Language (SGML), a very flexible markup language framework, XHTML is an application of XML, a more restrictive subset of SGML. Because XHTML documents need to be well-formed, they can be parsed using standard XML parsers—unlike HTML, which requires a lenient HTML-specific parser. – Wikipedia
XHTML Reference This reference is a best-practice approach, based on XHTML 1.0 Strict / XHTML 1.1.
XHTML is an acronym for “eXtensible HyperText Markup Language”, a reformulation of HTML 4.0 as an XML 1.0 application. XHTML provides the framework for future extensions of HTML and aims to replace HTML in the future. – xhtml.org