ref_period referential class to choose a period
data="data.frame"
providing correspondance between period and their English names
Objects can be created by calls of the form
new("ref_period", ...)
.
Other referential objects: charge,ref_choice-method
,
ref_checkbox-class
,
ref_choice-class
,
ref_coe-class
, ref_dc-class
,
ref_df-class
,
ref_horodate-class
,
ref_list-class
,
ref_par-class
,
ref_parqual-class
,
ref_parquan-class
,
ref_stage-class
,
ref_taxa-class
,
ref_year-class