diff --git a/docs/concept/#438-investigation-dDTR-api-endpoints/#438-investigation-dDTR-api-endpoints.md b/docs/concept/#438-investigation-dDTR-api-endpoints/#438-investigation-dDTR-api-endpoints.md
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--- a/docs/concept/#438-investigation-dDTR-api-endpoints/#438-investigation-dDTR-api-endpoints.md
+++ b/docs/concept/#438-investigation-dDTR-api-endpoints/#438-investigation-dDTR-api-endpoints.md
@@ -21,7 +21,7 @@ To this end, the API and the necessary changes to the IRS must be determined, do
## Summary
Extension of reference implementation of Digital Twin Registry (DTR) in Catena-X for scalable access management to Asset Administration Shells (AAS) and adhering Submodel server(s).
-## Assessment
+## Assessment
- IRS uses the EDC for any request to the dDTR and Submodel Server
@@ -71,15 +71,21 @@ No impact on data consumers.
### AAS_Access_v3_Architecture
-![AAS_Access_v3_Architecture.jpg](AAS_Access_v3_Architecture.jpg)
+![AAS_Access_v3_Architecture.svg](AAS_Access_v3_Architecture.svg)
+
+*This diagram was created with Inkscape
+from
+the original JPG from
+[#438: Investigation and impact determination on new dDTR API endpoints for access management](https://github.com/eclipse-tractusx/item-relationship-service/issues/438)
+in order to fulfill [TRG 1.04](https://eclipse-tractusx.github.io/docs/release/trg-1/trg-1-4).*
## Glossary
| Abbreviation | Name |
|--------------|---------------------------|
-| CRUD | Create Read Update Delete |
-| MIW | Managed Identity Wallet |
-| AAS | Asset Adminstration Shell |
+| CRUD | Create Read Update Delete |
+| MIW | Managed Identity Wallet |
+| AAS | Asset Adminstration Shell |
## References
- [Concept of CRUD API for Access management APIs](https://github.com/eclipse-tractusx/sldt-digital-twin-registry/issues/291)
diff --git a/docs/concept/#438-investigation-dDTR-api-endpoints/AAS_Access_v3_Architecture.jpg b/docs/concept/#438-investigation-dDTR-api-endpoints/AAS_Access_v3_Architecture.jpg
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