This step is zooming deeper into the application. We are no describing a singele component. The components are components where introduced in the application architecture view step 4b.
The documentation beside the model must also include the description of the implementation of the role and authorization concept as well as other technical and non technical stuff. Each component should be specified. Because of your generic aproach of you might not need no model each component...
The model type here: IT system landscape.
I think that there is no further information of the components following the purpose of focusing on Aris Express.
ARIS model
