This simple XHTML will not validate. What is the problem?
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<?xml version="1.0" encoding="UTF-8"?>
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
<head>
<title>My Title</title>
<link rel="stylesheet" type="text/css" href="myStyle.css"/>
</head>
<body>
<div>
<h1>Heading One</h1>
<p class="para1">Paragraph One</p>
<h3>Heading Two&开发者_Go百科lt;/h3>
<p>Paragraph Two</p>
<h3>Heading Three</h3>
<p>Paragraph Three</p>
<br />
<a href="Lab1Page2.html">Link One</a>
<br />
<a href="Lab1Page3.html">Link Two</a>
</div>
</body>
</html>
<p>Paragraph Three<p>
That is the problem.
Edit: the other <p> should obviously be </p>
Edit 2: Noticed a larger problem: The XML definition or whatever-it's-called should always be on the first line. If I recall correctly.
Edit 3: Yup, I checked. W3 validator tells this:
XML declaration allowed only at the start of the document
Run it through the W3C validator, and it will point you right at the problems: http://validator.w3.org/
Specifically:
This:
<?xml version="1.0" encoding="UTF-8"?>
Must go at the very top of the document, not below the DOCTYPE.
And you've forgotten a '/' on the closing p tag here:
<p>Paragraph Three<p>
Once those problems are corrected, it validates just fine.
You can run it through the W3C checker here (click on the "direct input" tab and copy/paste) and it will give you very specific feedback as to what doesn't validate
Try this:
<?xml version="1.0" encoding="UTF-8"?>
<!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" xml:lang="en" lang="en">
<head>
<title>My Title</title>
<link rel="stylesheet" type="text/css" href="myStyle.css"/>
</head> <body>
<div>
<h1>Heading One</h1> <p class="para1">Paragraph One</p>
<h3>Heading Two</h3> <p>Paragraph Two</p>
<h3>Heading Three</h3> <p>Paragraph Three</p>
<br /> <a href="Lab1Page2.html">Link One</a> <br /> <a href="Lab1Page3.html">Link Two</a>
</div>
</body> </html>
The <?xml version="1.0" encoding="UTF-8"?> must be the first line in the XML document.
See the XML Specifications: http://www.w3.org/TR/2006/REC-xml11-20060816/
To pass XHTML validator http://validator.w3.org you need to change
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
to
<!DOCTYPE html>
See this answer
加载中,请稍侯......
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