+my %rows;
+if (my $lang = shift @ARGV) {
+ my %filter = (lang => $lang);
+ my $cols = "ref, array_to_string(form || alt, '/'), prio, id, sub";
+ %rows = $db->select(_word => $cols, \%filter)->map_arrays;
+ defined $_->[-1] or pop @$_ for values %rows;
+ $rows{''} = [
+ (undef) x 3,
+ [$db->select(word => 'id', {cat => undef, ref => undef})->flat]
+ ];
+ say pp \%rows
+ =~ s/\\x\{([0-9A-F]+)\}/chr hex $1/ger;
+ exit;
+}
+else {
+ %rows = $db->select(_cat_words => "coalesce(id::text, ''), forms")->map;
+ $_ = [ map { [split /:/, $_, 3] } @{$_} ] for values %rows;
+ say pp \%rows;
+}