... 248WYSIWYG HTML editors, 362 – 363 • X • XHTML (eXtensible Markup Language)< ;html& gt; element, 65 adding DOCTYPE declarations, 64 65 adding document headers, 66 –71adding HTML DOCTYPE declarations, 64 adding ... features and functions, including built-in validators for CSS, HTML, and accessibility features; color coding and tag completion for HTML and XML; multi-file search and replace; and support for ... software, 364 Kompozer Web page editor, 363 • L •Label attribute, 2 46, 313labeling documents< ;html& gt; element, 65 adding (X )HTML DOCTYPE declarations, 64 65 adding (X )HTML namespaces, 65 66 adding...