tx_set_value
if ((r = tx_set_value(t, t_state, SCF_PROPERTY_STATE,
(r = tx_set_value(t, t_state_next, SCF_PROPERTY_NEXT_STATE,
(r = tx_set_value(t, t_stime, SCF_PROPERTY_STATE_TIMESTAMP,
if ((r = tx_set_value(t, t_aux, SCF_PROPERTY_AUX_STATE,
if (tx_set_value(t, e, pname, SCF_TYPE_ASTRING, v) != 0)