diff --git a/lib/SLUB/LZA/SIPBuilderBagIt.pm b/lib/SLUB/LZA/SIPBuilderBagIt.pm
index aa6f5ea014a029e7ad0782c897350969ea4f9912..389ae1cfb41c9b72f1ecb899cf6904334533c754 100644
--- a/lib/SLUB/LZA/SIPBuilderBagIt.pm
+++ b/lib/SLUB/LZA/SIPBuilderBagIt.pm
@@ -1,4 +1,44 @@
 package SLUB::LZA::SIPBuilderBagIt;
+#===============================================================================
+#         FILE: slubsipbuilderbagit.pl
+#
+#        USAGE: perl bin/slubsipbuilderbagit.pl --help
+#     EXAMPLES: perl bin/slubsipbuilderbagit.pl --man
+#
+#  DESCRIPTION: A CLI tool to create a valid SIP for ingest into SLUBArchiv.digital
+#
+# REQUIREMENTS: perl install version 5.28 or higher, as all necessary modules required
+#               module Archive::BagIt required version 0.070 or higher
+#               For Debian users: If cpan installations fails, please install libperl-dev and libperl5.28
+#               For Windows users: Check if UTF-8 flag set at
+#                                  Systemsteuerung > Zeit und Region > Region > Verwaltung/Gebietsschema ändern
+#
+#        NOTES: related to official document "SIP Spezifikation für automatischen Ingest SLUBArchiv"
+#               https://slubarchiv.slub-dresden.de/technische-standards-fuer-die-ablieferung-von-digitalen-dokumenten/
+#               option --save_option=copy is RECOMMENDED (If processing fails, manual restoration is needed!)
+#               option --add_meta_file="key: values" must be in quotes to be able to write whitespaces for values
+#
+#               Copyright (c) 2021
+# ORGANIZATION: Saxon State and University Library Dresden (SLUB)
+#      AUTHORS: Serhiy Bolkun (Serhiy.Bolkun@slub-dresden.de)
+#               Andreas Romeyke (Andreas.Romeyke@slub-dresden.de)
+#               Jens Steidl (Jens.Steidl@slub-dresden.de)
+#
+#
+#      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 3 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, see <https://www.gnu.org/licenses/>
+#===============================================================================
+
 use strict;
 use warnings;
 use utf8;