How to connect external applications to the EDC?

[hlange]

Hi,
I am currently experimenting with the EDC and the examples that I can see are focused to execute a specific task inside the EDC. However, when I look at my potential ecosystem than these tasks are handled by different application.

My first idea was it to create a DataStreamPublisher that has a selection of REST calls, that are informing the other application that it should run with these specific properties and when this action is finished return the result. The problem that I see with this solution is that I cannot communicate the state of the data except of the start and the end.

An example for this would be the following chain:

1. Get request from Consumer
2. Provider calls notifyPublisher of the DataStreamPublisher with the information from the Consumer
3. Then a REST call will be executed to an application to execute the task
4. During the task, the application informs the EDC about the state of the asset/data
5. EDC informs the data sovereignty service about the state of the asset

Questions:
• How will the data logging service be accessible by external application?
• Exist a better way to connect other application to the EDC?