Reference

Catmandu::Fix::Condition::is_valid_issn(3pm)

condition on validity of issn numbers

NAME

Catmandu::Fix::Condition::is_valid_issn - condition on validity of issn numbers

SYNOPSIS

   if is_valid_issn(issn_field)
     ...
   else
     ...
   end

SEE ALSO

Catmandu::Fix