[AT_DEFINE([AT_ordinal], AT_EVAL(AT_ordinal + 1))
pushdef([AT_group_description], [$1])
pushdef([AT_data_files], )
pushdef([AT_data_expout], )
pushdef([AT_data_experr], )
[AT_DEFINE([AT_ordinal], AT_EVAL(AT_ordinal + 1))
pushdef([AT_group_description], [$1])
pushdef([AT_data_files], )
pushdef([AT_data_expout], )
pushdef([AT_data_experr], )