Great Plugin. Microdata Support?

At this time, it does not recognize those. It may be more lenient in the future, especially with the changed support for titles which may be in WordPress 4.1.

However, on a general note, putting itemprop=”name” on a title tag really makes no sense. What would the itemscope be on in such a case? It could not be on the head element, so it would need to be on the HTML element. And making the whole HTML into an “item” is generally a bad idea. You would ideally want the itemscope to be on the body for a whole page scenario.

I realize that putting itemscope onto the main html element isn’t technically incorrect, but it’s definitely not what any of the examples on schema.org show. On the WebPage example, they show the itemscope covering the body, for example: http://schema.org/WebPage

The purpose of schema microdata is to allow things like search engines to better understand the underlying structure of the document, by identifying specific elements as having special meanings. Things such as the title and other elements in the head already have well-defined meanings. Adding microdata to them doesn’t really give you any benefits. It would be more effective to limit microdata to the body and other elements in the page which have less-specific markup, such as things in headers or generic div’s and span’s.

Basically, the “name” is a generic property from the “Thing” schema, so it would be better to put that on something such as the title of the blog post on a single-page markup. Blog posts have their own titles, which might not be the same as the title of the webpage as a whole.