SET_INTERSECT
SET_INTERSECT(JT(b)->dom, b->dom, nodewords);
SET_INTERSECT(JF(b)->dom, b->dom, nodewords);
SET_INTERSECT(ep->succ->et.edom, ep->edom, edgewords);
SET_INTERSECT(ep->succ->ef.edom, ep->edom, edgewords);