FYI - User:TheDJ has made a very handy tool that will let you see the
machine-readable data (per COM:MRD) for a given file on the File: page.
This helps ensure that any automated re-use can be done in a manner that's
license compliant and consistent with authors' wishes. To give it a spin,
import this guy into your common.js:
https://commons.wikimedia.org/wiki/User:TheDJ/datacheck.js
This should definitely help leading into the systematic structured data
efforts. Still early days and would make a nice gadget down the line :)
Erik