diff --git a/dhl.sh b/dhl.sh
index 29503dd..f67c05e 100755
--- a/dhl.sh
+++ b/dhl.sh
@@ -1,6 +1,19 @@
 #!/usr/bin/env sh
-fn="dhl-ds-versendung-3.csv"
+
+# target filename
 tn="dhl-ds-versendung.csv"
+
+# todo: download file (its UTF-8 encoded)
+
+fn="dhl-ds-versendung-3.csv"
+# backup
 cp -f "$fn" "dhl.csv"
+
+# replace special spaces and hyphens
 sed -i -e 's/[\u00A0\u202F[:space:]]+/ /g' -e 's/[\u2010\u2011\u2012\u2013\u002D]+/-/g' -e 's/[\u00AD\uFEFF]+//g' "$fn"
+
+# todo: convert encoding from UTF-8 to CP1252 "Windows"
+
+# a possibility for conversion? seems not to be reliant
 iconv -o "$tn" -f UTF-8 -t CP1252 "$fn" 
+