Sat Jun 2 13:52:26 EDT 2018

Finite trees as relations

Figure out the constraints to make this generic.  What does a tree
have to look like so it can be turned into a relation?

Is this ORM?  Probably not.  ORM probably provides indirection.  The
generic transformation is from a tree structure that is _finite_ into
a relation.

But: infinite trees can be made finite by introducing node references.
So this seems quite generic.  As long as nodes ca be tagged with a name.