diff --git a/README.md b/README.md
index ca7f690..74b9b56 100644
--- a/README.md
+++ b/README.md
@@ -33,4 +33,14 @@ This is the Storybook of the PoC content structure (content is depicted top righ
 
 This is the illustration of the [use cases (aka 'functionality') in the PoC content](https://confluence.telekom-mms.com/display/IPCEICIS/Proof+of+Concept+2024): 
 
-![](./use-cases.png)
\ No newline at end of file
+![](./use-cases.png)
+
+## Technical composition
+
+The 'edf_poc'-product should be as self-contained as possible. 
+
+Thus all parts coming from upstream repos should have a physical copy in this repo with a reference to the upstream repo. Therefore we need a mapping table from parts here to references in upstreams.
+
+Alternative: Submodules
+
+Proposal: The final product will be a export of the repo