global_alpha := default_global_alpha;
log_alpha := default_log_alpha;
log_missing := default_log_missing;
list_och := default_list_och;
alpha_type := default_alpha;
alpha_sort := default_alpha;
global_alpha := default_global_alpha;
log_alpha := default_log_alpha;
log_missing := default_log_missing;
list_och := default_list_och;
alpha_type := default_alpha;
alpha_sort := default_alpha;