Why is Google publisher HTML tag invalid according to W3C specification? Is there any way to correct this example:
<a href="http://plus.google.com/109469573972649651137?prsrc=3" rel="publisher" class="c3">
i got a hack around it its simple just as in verification of author here if an example
I'm not quite sure with your question whether you mean that the Google
If it's not working with Google you can use the rich snippets testing tool here: http://www.google.com/webmasters/tools/richsnippets
If its working with Google but w3 is showing it as invalid, i wouldn't say that's that much of a problem as the code is only going to be used by Google so as long as they can read it. Also, I think it's important to note that search engines are very good at interpreting HTML even bad or invalid HTML. So it not being 100% valid isn't something I'd be too concerned about especially if it's just this one link.