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diff --git a/lib/Test/Lintian/Output/EWI.pm b/lib/Test/Lintian/Output/EWI.pm
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+# Copyright (C) 2019 Felix Lechner
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 2 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, you can find it on the World Wide
+# Web at https://www.gnu.org/copyleft/gpl.html, or write to the Free
+# Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston,
+# MA 02110-1301, USA
+
+package Test::Lintian::Output::EWI;
+
+=head1 NAME
+
+Test::Lintian::Output::EWI -- routines to process EWI hints
+
+=head1 SYNOPSIS
+
+  use Path::Tiny;
+  use Test::Lintian::Output::EWI qw(to_universal);
+
+  my $ewi = path("path to an EWI hint file")->slurp_utf8;
+  my $universal = to_universal($ewi);
+
+=head1 DESCRIPTION
+
+Helper routines to deal with C<EWI> hints and hint files
+
+=cut
+
+use v5.20;
+use warnings;
+use utf8;
+
+use Exporter qw(import);
+
+BEGIN {
+    our @EXPORT_OK = qw(
+      to_universal
+    );
+}
+
+use Carp;
+use Const::Fast;
+use List::Util qw(all);
+use Unicode::UTF8 qw(encode_utf8);
+
+use Test::Lintian::Output::Universal qw(universal_string order);
+
+const my $EMPTY   => q{};
+const my $NEWLINE => qq{\n};
+
+=head1 FUNCTIONS
+
+=over 4
+
+=item to_universal(STRING)
+
+Converts the C<EWI> hint data contained in STRING to universal hints.
+They are likewise delivered in a multi-line string.
+
+=cut
+
+sub to_universal {
+    my ($ewi) = @_;
+
+    my @unsorted;
+
+    my @lines = split($NEWLINE, $ewi);
+    chomp @lines;
+
+    foreach my $line (@lines) {
+
+        # no hint in this line
+        next if $line =~ /^N: /;
+
+        # look for "EWI: package[ type]: name details"
+        my ($code, $package, $type, $name, $details)
+          = $line=~ /^(.): (\S+)(?: (changes|source|udeb))?: (\S+)(?: (.*))?$/;
+
+        # for binary packages, the type field is empty
+        $type //= 'binary';
+
+        croak encode_utf8("Cannot parse line $line")
+          unless all { length } ($code, $package, $type, $name);
+
+        my $converted = universal_string($package, $type, $name, $details);
+        push(@unsorted, $converted);
+    }
+
+    my @sorted = reverse sort { order($a) cmp order($b) } @unsorted;
+
+    my $universal = $EMPTY;
+    $universal .= $_ . $NEWLINE for @sorted;
+
+    return $universal;
+}
+
+=back
+
+=cut
+
+1;
+
+# Local Variables:
+# indent-tabs-mode: nil
+# cperl-indent-level: 4
+# End:
+# vim: syntax=perl sw=4 sts=4 sr et