It has been more than four years since XHTML replaced HTML 4 as the standard markup for Web documents, according to the World Wide Web Consortium (W3C) that seeks to promote standards for the evolution of the Web, but still most Web builders haven't switched to XHTML, which boasts several advantages over the older HTML standard with significant implications for the future of the Web such as improved standardization and accessibility.
By imposing stricter rules on the way markup tags are used, XHTML removes some of the vagueness and inconsistency that has plagued HTML code, which makes it easier for browsers, search engines and users to properly interpret the page markup. XHTML documents work better with screen readers and other adaptive technologies, which means that they score better with search engines.
