Web page written in XHTML, a reformulation of HTML 4 as an XML 1.0 application; uses standard HTML tags, but must conform to more strict XML guidelines.
Many current websites include Web pages based on either the XHTML 1.0 or XHTML 1.1 specification.
Program(s) that open xhtml files
Mac / Windows: Any Web browser
Information from FileInfo.com - The File Extensions Resource.
http://www.fileinfo.com/extension/xhtml
