Representation of a fishway, contains description data of all fishways from
the database along with the selected fishways (df) (integer)
Objects from the Class: Objects can be created by calls of the form
new("ref_df", df_selectionne=integer(), ouvrage=integer(),
data=data.frame()).
Object of class "integer" The identifier of the fishway
Object of class "integer" The attached dam
Object of class "data.frame" Data concerning the fishway
Other referential objects: charge,ref_choice-method,
ref_checkbox-class,
ref_choice-class,
ref_coe-class, ref_dc-class,
ref_horodate-class,
ref_list-class,
ref_par-class,
ref_parqual-class,
ref_parquan-class,
ref_period-class,
ref_stage-class,
ref_taxa-class,
ref_year-class