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1. The data which needs to be displayed like service details, service type details are requested to GUI (Angular project) to the UUI server.
2. UUI server is a dedicated server to UUI front end which has controllers/services to call other components. On receiving the request appropriate service is called from UUI server via MSB. MSB is where the other ONAP components like SO, AAI, etc. are registered with their API.
3. The response received from MSB is sent back to the UUI and displayed accordingly to the User.
4. The information which are created in UUI like Alarms, Service Instance details are stored in PostgreSQL DB which is specific to UUI server.
   

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2. API Dependencies

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