<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8" /> <title>CSS Test: First-child pseudo-element case sensitivity</title> <link rel="author" title="Microsoft" href="http://www.microsoft.com/" /> <link rel="help" href="http://www.w3.org/TR/CSS21/selector.html#first-line-pseudo" /> <meta name="flags" content="" /> <meta name="assert" content="First-child is case-insensitive." /> <style type="text/css"> div:fiRsT-cHiLd { color: green; } </style> </head> <body> <div>Filler Text</div> <p>Test passes if the "Filler Text" above is green.</p> </body> </html>