Semantic implications of tabindex="0"?

Hi All--

I have a question I hope you can answer. In reading about tabindex="0" it seems as if there are no limits to its application to non-focusable elements. I wonder, however, when it makes the most sense to use it. For example, are there assumptions that users will have based on the traditional targets of tabbing (i.e., form fields and links)?


Any thoughts on this?

Many thanks,

Mike Elledge