This is a preview of a developing guide for information only. It is not intended to be used until the completed v1.0.0 guide is released (around the end of March 2023)
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Location Extension
| Extension | I | Extension | There are no (further) constraints on this elementElement Id Extension Optional Extensions ElementDefinition Optional Extension Element - found in all resources. 
 
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| extension | I | 0..* | Extension | Element Id Extension.extension Additional content defined by implementationsAlternate names extensions, user contentDefinition May be used to represent additional information that is not part of the basic definition of the element. To make the use of extensions safe and manageable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension. There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions. The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone. Unordered, Open, by url(Value)Constraints 
 
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| UPRN | I | 0..1 | Extension | There are no (further) constraints on this elementElement Id Extension.extension:UPRN Additional content defined by implementationsAlternate names extensions, user contentDefinition May be used to represent additional information that is not part of the basic definition of the element. To make the use of extensions safe and manageable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension. There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions. The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone. 
 
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| url | 1..1 | System.StringFixed Value | Element Id Extension.extension:UPRN.url identifies the meaning of the extensionDefinition Source of the definition for the extension code - a logical name or a URL. The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition SHALL be a URI for the Structure Definition defining the extension. System.StringFixed Value UPRN 
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| value[x] | 0..1 | There are no (further) constraints on this elementElement Id Extension.extension:UPRN.value[x] Value of extensionDefinition Value of extension - must be one of a constrained set of the data types (see Extensibility for a list). 
 
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| valueString | string | Data Type | ||
| PAF | I | 0..1 | Extension | There are no (further) constraints on this elementElement Id Extension.extension:PAF Additional content defined by implementationsAlternate names extensions, user contentDefinition May be used to represent additional information that is not part of the basic definition of the element. To make the use of extensions safe and manageable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension. There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions. The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone. 
 
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| url | 1..1 | System.StringFixed Value | Element Id Extension.extension:PAF.url identifies the meaning of the extensionDefinition Source of the definition for the extension code - a logical name or a URL. The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition SHALL be a URI for the Structure Definition defining the extension. System.StringFixed Value PAF 
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| value[x] | 0..1 | There are no (further) constraints on this elementElement Id Extension.extension:PAF.value[x] Value of extensionDefinition Value of extension - must be one of a constrained set of the data types (see Extensibility for a list). 
 
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| valueString | string | Data Type | ||
| eastings | I | 0..1 | Extension | There are no (further) constraints on this elementElement Id Extension.extension:eastings Additional content defined by implementationsAlternate names extensions, user contentDefinition May be used to represent additional information that is not part of the basic definition of the element. To make the use of extensions safe and manageable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension. There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions. The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone. 
 
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| url | 1..1 | System.StringFixed Value | Element Id Extension.extension:eastings.url identifies the meaning of the extensionDefinition Source of the definition for the extension code - a logical name or a URL. The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition SHALL be a URI for the Structure Definition defining the extension. System.StringFixed Value eastings 
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| value[x] | 0..1 | There are no (further) constraints on this elementElement Id Extension.extension:eastings.value[x] Value of extensionDefinition Value of extension - must be one of a constrained set of the data types (see Extensibility for a list). 
 
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| valueString | string | Data Type | ||
| northings | I | 0..1 | Extension | There are no (further) constraints on this elementElement Id Extension.extension:northings Additional content defined by implementationsAlternate names extensions, user contentDefinition May be used to represent additional information that is not part of the basic definition of the element. To make the use of extensions safe and manageable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension. There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions. The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone. 
 
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| url | 1..1 | System.StringFixed Value | Element Id Extension.extension:northings.url identifies the meaning of the extensionDefinition Source of the definition for the extension code - a logical name or a URL. The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition SHALL be a URI for the Structure Definition defining the extension. System.StringFixed Value northings 
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| value[x] | 0..1 | There are no (further) constraints on this elementElement Id Extension.extension:northings.value[x] Value of extensionDefinition Value of extension - must be one of a constrained set of the data types (see Extensibility for a list). 
 
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| valueString | string | Data Type | ||
| what3words | I | 0..1 | Extension | There are no (further) constraints on this elementElement Id Extension.extension:what3words Additional content defined by implementationsAlternate names extensions, user contentDefinition May be used to represent additional information that is not part of the basic definition of the element. To make the use of extensions safe and manageable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension. There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions. The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone. 
 
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| url | 1..1 | System.StringFixed Value | Element Id Extension.extension:what3words.url identifies the meaning of the extensionDefinition Source of the definition for the extension code - a logical name or a URL. The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition SHALL be a URI for the Structure Definition defining the extension. System.StringFixed Value what3words 
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| value[x] | 0..1 | There are no (further) constraints on this elementElement Id Extension.extension:what3words.value[x] Value of extensionDefinition Value of extension - must be one of a constrained set of the data types (see Extensibility for a list). 
 
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| valueString | string | Data Type | ||
| url | 1..1 | System.StringFixed Value | Element Id Extension.url identifies the meaning of the extensionDefinition Source of the definition for the extension code - a logical name or a URL. The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition SHALL be a URI for the Structure Definition defining the extension. System.StringFixed Value https://fhir.nhs.uk/StructureDefinition/LocationExtension 
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| value[x] | 0..0 | There are no (further) constraints on this elementElement Id Extension.value[x] Value of extensionDefinition Value of extension - must be one of a constrained set of the data types (see Extensibility for a list). 
 
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