问题
can we use the meta name="fb:admins"
instead of
meta property="fb:admins"
for w3c validation ??
回答1:
I'm answering this even though this is an old question since I think it's of value for whoever wants info on this in the future. Evan's probably right when he says it won't pass validation, but I think the answer is that you want to keep the property="" attribute. Taking from an old Facebook developer forum post concerning this question exactly it turns out your document should be an XHTML + RDFa document. This will validate in W3C, thanks to the DOCTYPE declaration:
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML+RDFa 1.0//EN" "http://www.w3.org/MarkUp/DTD/xhtml-rdfa-1.dtd">
<html xmlns="http://www.w3.org/1999/xhtml"
version="XHTML+RDFa 1.0"
xmlns:og="http://ogp.me/ns#"
xml:lang="en">
<head>
<title>Virtual Library</title>
<meta property="og:title" content="My Website"/>
</head>
<body>
<p>Moved to <a href="http://example.org/">example.org</a>.</p>
</body>
</html>
You can find out more in in the W3C spec for RDFa, and in this specific example of <meta property=""/>.
回答2:
No, you'll just get this:
Line 1, Column 123: Bad value fb:app_id for attribute name on element meta: Keyword fb:app_id is not registered.
…="fb:app_id" content="176557225718913"><meta charset="utf-8"><meta name="descr…
Syntax of metadata name:
A metadata name listed in the HTML specification or listed in the WHATWG wiki. You can register metadata names on the WHATWG wiki yourself.
来源：https://stackoverflow.com/questions/6166820/there-is-no-attribute-property-in-facebook-meta-tag-in-validation-w3c