[Developers] images and cc

[Brendan Neutra]

Hi all,

A question on the data side of things:

I'm developing some great architecture data and I've got a script to 
produce a google earth file from Freebase data (shameless plug: 
http://www.neutraweb.com/Richard_Neutra.kml)

I've contacted some flickr users who have creative commons license 
photos that are of interest and have gotten really positive response 
from them.

What's the proper way to attribute these kinds of photos?  I know there 
is a "source" property for images/content. There is also the article you 
can attach to the photo. This also brings up the thorny issue of: if 
someone builds a 3rd party app, how do we encourage/push them to expose 
the attribution of the photo in the app?

Brendan