**Synchronization Related Attributes**
ATABORT opt_set L_BRA abloc R_BRA TEMPO opt_set expr TEMPO opt_set L_BRA event_list_expr R_BRA GRAIN opt_set extended_duration COEF opt_set expr ACTION opt_set maxname mess_cel ACTION opt_set L_BRA abloc R_BRA IMMEDIATE STATIC_SCOPE NOREC EXCLUSIVE