main driven design in telco industry where we are happy that we have a global guidelines regarding this there is a community gathered around TM for telemedicine forum organization that already built for us some models so we know what are the customers what are the products what are the services resources payments so we already have domain driven design that can be followed basically we already have domain prepared that just need adjustment for a specific tau and this domain is extensive enough so that you can extend it without let's say many