Whats BITLY PROCESSED

A new tag introduced?

[getxb]

When I try to Inspect some HTML code in Firefox browsers with the Firebug tool I see this: <a href="#" bitly="BITLY_PROCESSED">

What's bitly="BITLY_PROCESSED"?

Thanks

[rocknbil]

I am "guessing" that is related to one of those online URL-shortening thingies and a way to track it; a Google search turns over 107K results.