I have Dublin Core (DC) meta data in <meta ...> and <link...> elements. Testing my html document with the validator fails to identify the dublin core meta data in my document. But when using DC tags in elemetns like <td rel="dc:date" content="2017-02-10">10 February 2017 </td> the validator identifies those meta data elements.
This validator also fails to identify DC tags in meta and link elements.
Example that does not validate but should:
<?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">
<head profile="http://dublincore.org/specifications/dublin-core/dc-html/2008-08-04/">
<title>Services to Government</title>
<link rel="schema.DC" href="http://example.org/terms/" />
<meta name="DC.date" content="2007-05-05" />
</head>
<body>
</body>
</html>
Is the meta data invalid or are the validators in the wrong? Is there a validator that will support <meta > and <link>?
it seems like the prefix: @prefix dc: http://purl.org/dc/elements/1.1/ . is not appearing the the validator results for some reason.
I have tried adding additional vocabulaires like:
<?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">
<head profile="http://dublincore.org/specifications/dublin-core/dc-html/2008-08-04/">
<title>Services to Government</title>
<link rel="schema.DC" href="http://example.org/terms/" />
<link rel="schema.DC" xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:gml="http://www.opengis.net/gml" xmlns:v="http://rdf.data-vocabulary.org/#"/>
<meta name="DC.date" content="2007-05-05" />
</head>
<body>
<td rel="dc:date" content="2017-02-10">10 February 2017</td>
</body>
</html>
Without success.
To recreate, just paste the example html into one of the validators linked above.
Those examples are written with an obviously unsupported syntax. So the validators are not suppose to detect it, as they support common syntax, such as RDFa, JSON-LD, Microdata etc.
Here's a quote that might be relevant:
https://www.dublincore.org/resources/metadata-basics/
Parsing those examples would require a parser for that specific syntax (there doesn't seem to be many out there..).
So the solution might be to use some of the common serializations (JSON-LD, Microdata, RDFa)