diff --git a/archiv-metadaten/README.md b/archiv-metadaten/README.md
new file mode 100644
index 0000000..28c3f95
--- /dev/null
+++ b/archiv-metadaten/README.md
@@ -0,0 +1,17 @@
+---
+gitea: none
+include_toc: true
+---
+# Archiv-Metadaten
+
+## eCH-0160
+
+### Konvertierung eCh-0160 nach Matterhorn METS
+
+https://www.ech.ch/sites/default/files/dosvers/hauptdokument/AUXI_d_DEF_2022-03-14_eCH-0257_V1.0.0_Metadatentransformationen.pdf
+
+## Matterhorn METS
+
+  - [Spezifikation](https://wiki.docuteam.ch/lib/exe/fetch.php?media=oais:spezifikation_matterhorn-mets_20160803_wi.pdf)
+  - [Übersicht](https://docs.docuteam.ch/de/introduction/matterhorn/)
+  - [METS Doku Roger, word](files/matterhorn_mets_doku_roger.docx)
\ No newline at end of file
diff --git a/archiv-metadaten/files/matterhorn_mets_doku_roger.docx b/archiv-metadaten/files/matterhorn_mets_doku_roger.docx
new file mode 100755
index 0000000..8fc75e5
Binary files /dev/null and b/archiv-metadaten/files/matterhorn_mets_doku_roger.docx differ
diff --git a/file-formats-metadata/README.md b/file-formats-metadata/README.md
new file mode 100644
index 0000000..112ecb7
--- /dev/null
+++ b/file-formats-metadata/README.md
@@ -0,0 +1,107 @@
+---
+gitea: none
+include_toc: true
+---
+# File formats and file metadata
+
+## exiftool
+
+see examples at https://exiftool.org/examples.html
+
+### List of all metadata fields
+
+Metadata is usually stored in one of the following:
+
+  - XMP https://www.exiftool.org/TagNames/XMP.html (especially XMP *dc* Tags)
+  - EXIF https://exiftool.org/TagNames/EXIF.html
+  - IPTC https://exiftool.org/TagNames/IPTC.html Older format, replaced more and more by XMP.
+
+### list all metadata
+
+```
+exiftool /images/1988-klassenfoto-elzmatte-3.jpg
+```
+
+in RDF format:
+
+```
+exiftool -a -g -struct -X 1988-klassenfoto-elzmatte-3.jpg
+```
+
+### get certain field
+
+Where -Subject stands for the Subject field in XMP.
+
+```
+exiftool -s -Subject /images/1988-klassenfoto-elzmatte-3.jpg
+```
+
+### overwrite field
+
+#### delete/remove
+
+```
+exiftool -Subject="" -overwrite_original 1988-klassenfoto-elzmatte-3.jpg
+```
+
+#### remove single term
+
+```
+exiftool -Subject-="1988" -overwrite_original /image/1988-klassenfoto-elzmatte-3.tif
+```
+
+#### add single term
+
+```
+exiftool -Subject="1988" -overwrite_original /image/1988-klassenfoto-elzmatte-3.tif
+```
+
+to add more terms, keeping the existing ones:
+
+```
+exiftool -Subject+="1988" -Subject+="roger" -overwrite_original /image/1988-klassenfoto-elzmatte-3.tif
+```
+
+#### add multiple terms
+
+This will overwrite existing terms.
+
+```
+exiftool -sep ", " -Subject="1988, roger" -overwrite_original /image/1988-klassenfoto-elzmatte-3.tif
+```
+
+## droid
+
+Format Identifier CLI and GUI based on PRONOM PUID
+
+https://www.nationalarchives.gov.uk/information-management/manage-information/preserving-digital-records/droid/
+
+## fido
+
+Format Identifier CLI based on PRONOM PUID
+
+https://github.com/openpreserve/fido
+
+## jhove
+
+CLI and GUI tool for format identification and validation. Can be used e.g. to determine if a XML or SVG is valid.
+
+https://jhove.openpreservation.org/
+
+## siegfried
+
+CLI command tool. Shows PRONOM PUID, mimetype.
+
+https://openpreservation.org/blogs/siegfried-pronom-based-file-format-identification-tool/
+
+## Sigcheck
+
+Sigcheck is a command-line utility that shows file version number, timestamp information, and digital signature details, including certificate chains.
+
+See https://learn.microsoft.com/en-us/sysinternals/downloads/sigcheck
+
+## veraPDF
+
+PDF/A validator and repairer. GUI and CLI.
+
+https://verapdf.org/home/