Planet13 - 3:17 pm on Jun 24, 2011 (gmt 0)
But why are you worried? How that would cause duplicate content?
Good question. Not to hijack this thread, but what I thought using Open Graph MIGHT do is sort of "republish" your html web page ON facebook pages.
Your page will appear in the "Likes and Interests" section of the user's profile, and you have the ability to publish updates to the user.
That to me sounds like my web site page will reappear on facebook user pages. So if I have 50 people who like me, then there would be 50 copies of my html page floating around on facebook user pages.
Then with the massive page rank that facebook enjoys, google would think that my page is a duplicate.
But maybe I don't understand correctly what this all means. And maybe google would naturally assume that anything it crawled on facebook would be duplicate content anyway - not an original source.
So I may be worried over nothing.