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Test Info:

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN" "http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd">
<head>
<title>CSS Test: Valid Identifiers (starting with -) as Classes and IDs</title>
<link rel="author" title="L. David Baron" href="https://dbaron.org/"/>
<link rel="author" title="Ray Kiddy" href="mailto:ray@ganymede.org"/>
<link rel="match" href="ident-003-ref.xht"/>
<meta name="flags" content="invalid"/>
<style type="text/css">
.one { color: red; background: white; }
.-ident, .one { color: green; }
.two { color: red; background: white; }
#-ident, .two { color: green; }
.three { color: green; background: white; }
.-1ident, .three { color: red; }
.four { color: green; background: white; }
#-1ident, .four { color: red; }
.five { color: red; background: white; }
.-\31ident, .five { color: green; }
.six { color: red; background: white; }
#-\31ident, .six { color: green; }
</style>
</head>
<body>
<p class="one">This should be green.</p>
<p class="two">This should be green.</p>
<p class="three">This should be green.</p>
<p class="four">This should be green.</p>
<p class="five">This should be green.</p>
<p class="six">This should be green.</p>
</body>
</html>