Get the codebook with regular expression to recode variables
based on the FILGRUPPE and LESID number. Specification group ALLE
will be used when neither FILGRUPPE nor LESID is specified.
See also
Other recode functions:
do_recode(),
do_recode_aggregate(),
do_recode_post(),
do_recode_regexp(),
get_codebok(),
get_codebok_aggregate()
