I strongly dislike the parent-child-sibling(-friend) vocabulary Excalibrain introduces though, as it implies an order of creation. Parents exist first, children from parents.
I'm curious what terms Ton uses instead of 'parent' and 'child' then - I agree with his idea that parentage implies order of creation but am unsure of a better alternative.
This may nicely fit a need I have with mapping relationships and walking connections. The is a knowledge space that is cutting across three or four organizations with various sponsors of the organizations (with some overlaps) and researcher advisors (which overlap) that I have relationships with. Also connections with universities. Trying to see the overlaps and interconnections, so to find a path to connect and possibly put many of my lenses to use.
I've been turning to The Brain to see this, but it is having to input the information again, which means annotations and updates will likely break at some point.