@bob that is a very interesting idea.

The one federated wiki I know is #FedWiki as explained on this page on how it works on #commoning

http://makecommoningwork.fed.wiki/view/welcome-visitors/view/federated-wiki

I started this topic a while ago on #SocialHub to keep track on some resources as I come upon them, and added details from that page..

https://socialhub.activitypub.rocks/t/exploring-semantic-knowledge-base-solutions/1399