ARIS Document Storage API - how to use it

Dear community members,

I'm busy creating an app using the ARIS APIs:

- User Management API

- Repository API

- Document Storage API

The Repository API has very good documentation (.pdf), which helps me a lot to understand it's usage and functionality. For the Document Storage API it is much more difficult to understand. The /apidocs for this API gives me more questions then clarity. Is there a simular kind of documentation available for this API? Right now, i can't test it succesfully. Neither with the /apidocs or with a test client like SOAP-UI or Postman.

Help is more then welcome.

Regards,

Adriaan.