I'm trying to use Dublin Core with HTML5, when I try to validate the code with W3C validator I got a error.
This is the code:
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<link rel="schema.dcterms" href="http://purl.org/dc/terms/">
<meta name="dc.language" content="en">
<meta name="dc.title" content="web site title" />
<title>Test</title>
</head>
<body>
</body>
</html>
The meta keyword dc.language is registered: valid.
The link type schema.dcterms is registered, however, not in the "HTML5 link type extensions" section (so it doesn’t confirm to the requirements described in the HTML5 spec): so it’s, strictly speaking, invalid.
The meta keyword dc.title is not registered: invalid.
You might want to use dcterms.title instead. (By the way, the keyword dcterms.language is also registered.)