[steve_gh]

This is interesting - can you expand a little or provide a link. I get a-b links, but where do father and son come in?

[rjh29]

I think I read it in a tech company's blog post, but there are some Wikipedia articles on the subject:

https://en.wikipedia.org/wiki/Triplestore

https://en.wikipedia.org/wiki/Entity%E2%80%93attribute%E2%80...

The father/son is the relation between the two nodes, to support multiple relation types.