@startuml Public endpoint (free for chat)
User -> Endpoint: Create & send  invitation for endpoint (Generate User ContactCard and create endpoint pending contact)
Endpoint -> User: Auto-accept invitation and answer (Generate Endpoint ContactCard and create finalized User contact)
User -> Endpoint: [auto]validate Answer, invitation finalize (Finalize Endpoint contact and notify Endpoint that communication is possible)
Endpoint -> User: query mandatory/optional info for profile publication
User -> Endpoint: provide info
Endpoint -> All: Publishes User ContactCard and info
Endpoint -> User: notify publication done, service active
User -> Endpoint: search for contacts
@enduml