Class enabling to load the list of qualitative parameters and to select one of them. It inherits from 'ref_par', uses its 'choice' method
valqual='data.frame'
the list of qualitative parameters
cedric.briand@eptb-vilaine.fr
Other referential objects:
charge,ref_choice-method
,
ref_choice-class
,
ref_coe-class
,
ref_dc-class
,
ref_df-class
,
ref_horodate-class
,
ref_list-class
,
ref_par-class
,
ref_parquan-class
,
ref_stage-class
,
ref_taxa-class
,
ref_year-class