| Patient.id[0] | UKCore-Patient-Extension-AddressKey-Example | 
| Patient.address[0].extension[0].url[0] | https://fhir.hl7.org.uk/StructureDefinition/Extension-UKCore-AddressKey | 
| Patient.address[0].extension[0].extension[0].url[0] | type | 
| Patient.address[0].extension[0].extension[0].valueCoding[0].system[0] | https://fhir.hl7.org.uk/CodeSystem/UKCore-AddressKeyType | 
| Patient.address[0].extension[0].extension[0].valueCoding[0].code[0] | PAF | 
| Patient.address[0].extension[0].extension[0].valueCoding[0].display[0] | Postcode Address File | 
| Patient.address[0].extension[0].extension[1].url[0] | value | 
| Patient.address[0].extension[0].extension[1].valueString[0] | LS10ABC | 
| Patient.address[0].line[0] | 4 Sandmoor Drive | 
| Patient.address[0].city[0] | LEEDS | 
| Patient.address[0].postalCode[0] | LS17 7DF | 
| Patient | 
| id : UKCore-Patient-Extension-AddressKey-Example | 
| address | 
| extension | 
| extension | 
| url : type | 
| value | 
| system : https://fhir.hl7.org.uk/CodeSystem/UKCore-AddressKeyType | 
| code : PAF | 
| display : Postcode Address File | 
| extension | 
| url : value | 
| value : LS10ABC | 
| url : https://fhir.hl7.org.uk/StructureDefinition/Extension-UKCore-AddressKey | 
| line : 4 Sandmoor Drive | 
| city : LEEDS | 
| postalCode : LS17 7DF | 
<Patient xmlns="http://hl7.org/fhir"> <id value="UKCore-Patient-Extension-AddressKey-Example" /> <address> <!-- **************extension start************** --> <extension url="https://fhir.hl7.org.uk/StructureDefinition/Extension-UKCore-AddressKey"> <extension url="type"> <valueCoding> <system value="https://fhir.hl7.org.uk/CodeSystem/UKCore-AddressKeyType" /> <code value="PAF" /> <display value="Postcode Address File" /> </valueCoding> </extension> <extension url="value"> <valueString value="LS10ABC" /> </extension> </extension> <line value="4 Sandmoor Drive" /> <city value="LEEDS" /> <postalCode value="LS17 7DF" /> <!-- *************extension end ***************** --> </address> </Patient>
{ "resourceType": "Patient", "id": "UKCore-Patient-Extension-AddressKey-Example", "address": [ { "extension": [ { "url": "https://fhir.hl7.org.uk/StructureDefinition/Extension-UKCore-AddressKey", "extension": [ { "url": "type", "valueCoding": { "system": "https://fhir.hl7.org.uk/CodeSystem/UKCore-AddressKeyType", "code": "PAF", "display": "Postcode Address File" } }, { "url": "value", "valueString": "LS10ABC" } ] } ], "line": [ "4 Sandmoor Drive" ], "city": "LEEDS", "postalCode": "LS17 7DF" } ] }