Statuses and transitions
Per transition: who may make the move.
Per transition: who may make the move.
Who may make it is roles where a transition names any, and permission_code otherwise. The two
are read in that order rather than together, so an edge given roles is decided by them alone and a
stale permission code left beside them refuses nobody.
What must hold and what happens afterwards are rules (entity, TRANSITION_GUARD and TRANSITIONED); what must be filled in is a REQUIRE condition on the field, in the Form Studio.

