@startuml
skinparam sequenceArrowThickness 2
skinparam roundcorner 5
skinparam maxmessagesize 180
skinparam sequenceParticipant bold
title Lookup EDI number for an enrolled Patient's General Practice
actor "Integrating application user" as User #CornflowerBlue
participant "Integrating application" as A #CornflowerBlue
participant "<FHIR API> NHI" as B #CornflowerBlue
participant "<FHIR API> HPI" as C #CornflowerBlue
participant "NHI MDM" as D #CornflowerBlue
participant "HPI MDM" as E #CornflowerBlue
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User -> A: Lookup EDI number the General Practice the Patient is enrolled with
activate A
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A -> B: GET<Endpoint>/Patient/[nhi-id]
activate B
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B -> B: Validate[]
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B -> D: Request
activate D
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D -[dashed]-> B:  
deactivate D
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B -> A: Return Patient resource (including Patients enrolled General Practice)
deactivate B
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A -> C: Use hpi-facility-id to get EDI Get<Endpoint>/Location/[hpi-facility-id]
activate C
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C -> C: Validate[]
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C -> E: Request
activate E
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E -[dashed]-> C:  
deactivate E
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C -[dashed]-> A:Return Facility [Location resource]
deactivate C
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A -[dashed]-> A: Extract the messaging address containing the EDI number for the General Practice
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A -> User: Display EDI number to user
deactivate A
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@enduml