this - I was asking for a change from exists to undef (with the idea that
passing an undef in would negate an inherited value, and reinvoke the default
determination)
+
+* After an offline discussion both mst and riba agreed that the current
+relationship definition framework is bollocks anyway, and introducing a new
+concept (owned) will make things even messier. Instead we settled on a flag
+of is_belongs_to => 1/0, which should be sufficient for the time being, and
+for what frew needed it for