City of Data contains a lot of data which is not accessible through the front-end UI, e.g., the listing of powers of enemy factions (
see here) unless you know the magic URL query formula and the name of the faction used by the database.
In that link above, I have a list that I found somewhere long ago of all the available category searches. I'm sure that list has expanded by now, but, how does one find that out? There is no drop down menu for those searches. If someone has an updated list and would post it or PM it to me, I'd appreciate it!