From ca7439cc0ad03c3693ed90edb0ca6beafcbadd30 Mon Sep 17 00:00:00 2001
From: Peter Nerlich <peter.nerlich+dev@googlemail.com>
Date: Wed, 20 Sep 2023 13:48:37 +0200
Subject: [PATCH] conform to PDF-A standard for archival

---
 preamble.tex | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/preamble.tex b/preamble.tex
index 2960c47..11df9e3 100644
--- a/preamble.tex
+++ b/preamble.tex
@@ -1,5 +1,8 @@
 % \renewcommand*{\chapterheadstartvskip}{}
 
+% Conform to PDF-A standard for archival
+\usepackage[a-1b]{pdfx}
+
 \usepackage[english, ngerman]{babel}
 
 \usepackage{xcolor}