there isn't an API call that will give you an old screen name of a user.
mentions are computed both at posting time, and by doing textual lookups
depending on the situation.
On Sat, Feb 13, 2010 at 11:46 AM, Daniel Peebles <pumpkin...@gmail.com>wrote:
> I've been trying to extract mentions from some historical tweets I
> collected (some a couple of years old) and as the mentions are textual, some
> of the screen names have changed. Is there any way to look up a user id
> based on an old screen name of that user? Does twitter even maintain that
> information? Do the API methods for mentions simply extract possible
> mentions at posting time or are they doing a textual lookup as well?
Twitter Platform Team