How much Facebook Public Data is available via their API?

开发者_StackOverflow中文版I am curious as to how much data can be gathered using the fql or graph api from facebook. If the user has their info marked as public and I am not friends with them, i can see it on the site. However, i have just paid for a completed project someone did for me and the interface they designed does not get that data. For instance, their likes. I was told the api does not support all facebook data, but that seems wrong to me.

Here is the documentation for the graph api. Hopefully this will help you discover what data is available.