render puml diagrams in readme

README.md

@@ -14,6 +14,22 @@ OpenID Federations Specification:
 Trust & Identity Incubator eduGAIN POC:
 - https://wiki.geant.org/display/GWP5/eduGAIN+PoC
 
+## Processes
+
+The following sequence diagrams describe processes of the eduGAIN PoC federation that are not covered by the OpenID Federation specification.
+
+1. Enrollment
+
+![PlantUML model](https://plantuml.com/plantuml/proxy?src=https://gitlab.software.geant.org/edugain/oidfed-docs/-/raw/updates/Enrollment_Endpoint.puml)
+
+2. Trust Mark issuance
+
+![PlantUML model](https://plantuml.com/plantuml/proxy?src=https://gitlab.software.geant.org/edugain/oidfed-docs/-/raw/updates/Trust_Mark_Issuance_Endpoint.puml)
+
+3. Trust Mark issuance for the eduGAIN Trust Mark
+
+![PlantUML model](https://plantuml.com/plantuml/proxy?src=https://gitlab.software.geant.org/edugain/oidfed-docs/-/raw/updates/Trust_Mark_Issuance_eduGAIN.puml)
+
 ## License
 
 Unless otherwise stated, all the content of this repository is licensed as