，
<!doctype html public "-//w3c//dtd xhtml 1.0 strict//en" "3./tr/xhtml1/dtd/xhtml1-strict.dtd">
<html xmlns="3./1999/xhtml">
<body>
<h1></h1>
<fieldset>
，
<!doctype html public "-//w3c//dtd xhtml 1.0 strict//en" "3./tr/xhtml1/dtd/xhtml1-strict.dtd">
<html xmlns="3./1999/xhtml">
<body>
<h1></h1>
<fieldset>