This could dovetail with an idea I floated to use source=* for a project-wide identifier of some sort that could point back to the wiki for more details. We definitely don’t have to support that right away, but if we can steer people towards the subkeys for things that definitely aren’t these identifiers, then eventually we’ll be able to optimize around the identifiers with more confidence.
If folks agree with this approach, once the dust clears, I could do a mass edit in the database to move things that look like URLs to source:url=*, and someone could fix ohm-inspector to look at that key.