The HTML document uses an outdated XHTML 1.0 Transitional doctype declaration:
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
along with the xmlns and self-closing tag syntax. This doctype and syntax were standard in early 2000s but are no longer recommended. For modern web development, HTML5 should be used:
<!DOCTYPE html>
This simplifies syntax, improves browser compatibility, and allows use of newer HTML and CSS features. Unless there's a specific reason to stick to XHTML (such as legacy system constraints), this document should be updated to use the HTML5 doctype and conforming syntax.
The HTML document uses an outdated XHTML 1.0 Transitional doctype declaration:
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"along with the xmlns and self-closing tag syntax. This doctype and syntax were standard in early 2000s but are no longer recommended. For modern web development, HTML5 should be used:
<!DOCTYPE html>This simplifies syntax, improves browser compatibility, and allows use of newer HTML and CSS features. Unless there's a specific reason to stick to XHTML (such as legacy system constraints), this document should be updated to use the HTML5 doctype and conforming syntax.