#file name yaml.pl
use YAML qw(Dump Bless);
$hash = {isbn => '0-7852-1155-1', title => 'The New Strong Exhaustive Concordance of the Bible', author => 'James Strong, LL.D., S.T.D.', publisher => 'Thomas Nelson Publishers', city => 'Nashville, Tennessee', year => '1995'};
    print Dump $hash;