<-prior    up^
Methods of moving attn in a node next->

Gress moves attention from one arrow to the next within the set of arrows of the same predicate.  Gress fails when there are no more arrows in that predicate, and moves to the first arrow of the predicate.  
diagram of gress showing how attn moves from arrow to arrow within one verb
Sym moves attention from one predicate to the next within the set of predicates within the same node.  sym fails when there are no more predicates, and moves to the first arrow of the first predicate of the node.  
digram of sym moving attention from predicate to predicate withing the same node