New HTML5 'context' meta tag [suggestion]

Hi, i don't know if they're still taking suggestions to add to the new HTML5
spec but i had what i think could be a really good idea.

A new 'context' meta tag to be used to describe the context / genre of the
documents content.

The usage would be similar to that of the old 'keywords' tag but using
contextual keywords such as 'news,sports,fiction,sci-fi,engineering
documentation,blog' etc. etc. - The possibilities are endless, with
potential for libraries of hundreds or even thousands of recognised
contextual keywords to clarify the positioning and content of a document.

With search engine support it could help to make the web an easier place to
both publish, categorise and search for content.

I hope to generate significant interest in this possibility and eventually
get it adopted into the HTML5 spec!

I'd love to hear what people think about this.