NPHCDA Immunization FHIR IG
0.7.0 - ci-build
NPHCDA Immunization FHIR IG, published by https://nphcda.gov.ng. This guide is not an authorized publication; it is the continuous build for version 0.7.0 built by the FHIR (HL7® FHIR® Standard) CI Build. This version is based on the current content of https://github.com/Nigeria-FHIR-Community/NPHCDA-ImmunizationIG/ and changes regularly. See the Directory of published versions
Draft as of 2025-09-26 |
Definitions for the ng-encounter-signature extension.
Guidance on how to interpret the contents of this table can be foundhere
0. Extension | |
Definition | A digital or electronic signature capturing who signed, when, type, and signature data. Extension to capture the practitioner's digital signature on an Encounter resource. |
Short | NG-Imm Encounter Signature |
2. Extension.extension | |
Control | 0..0 |
4. Extension.url | |
Fixed Value | http://nphcda.gov.ng/ig/immunization/StructureDefinition/ng-encounter-signature |
6. Extension.value[x] | |
Control | 1..? |
Type | Signature, date, Meta, Address, Attachment, integer, Count, DataRequirement, Dosage, uuid, Identifier, Coding, SampledData, id, positiveInt, Distance, Period, Duration, canonical, Range, RelatedArtifact, base64Binary, UsageContext, Timing, decimal, CodeableConcept, ParameterDefinition, dateTime, code, string, Contributor, oid, instant, ContactPoint, HumanName, Money, markdown, Ratio, Age, Reference, TriggerDefinition, Quantity, uri, url, Annotation, ContactDetail, boolean, Expression, unsignedInt, time |
[x] Note | SeeChoice of Data Typesfor further information about how to use [x] |
Must Support | true |
8. Extension.value[x].when | |
Must Support | true |
10. Extension.value[x].who | |
Must Support | true |
Guidance on how to interpret the contents of this table can be foundhere
0. Extension | |
Definition | A digital or electronic signature capturing who signed, when, type, and signature data. Extension to capture the practitioner's digital signature on an Encounter resource. Optional Extension Element - found in all resources. |
Short | NG-Imm Encounter SignatureOptional Extensions Element |
Control | 0..* This element is affected by the following invariants: ele-1 |
Is Modifier | false |
Invariants | ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count())) ext-1: Must have either extensions or value[x], not both ( extension.exists() != value.exists() )ext-1: Must have either extensions or value[x], not both (extension.exists() != value.exists()) |
2. Extension.extension | |
Definition | An Extension 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. |
Short | ExtensionAdditional content defined by implementations |
Comments | 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. |
Control | 0..0* |
Type | Extension |
Is Modifier | false |
Summary | false |
Alternate Names | extensions, user content |
Invariants | ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count())) ext-1: Must have either extensions or value[x], not both (extension.exists() != value.exists()) |
Slicing | This element introduces a set of slices on Extension.extension . The slices areUnordered and Open, and can be differentiated using the following discriminators: |
4. Extension.url | |
Definition | Source of the definition for the extension code - a logical name or a URL. |
Short | identifies the meaning of the extension |
Comments | 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. |
Control | 1..1 |
Type | uri |
Is Modifier | false |
XML Format | In the XML format, this property is represented as an attribute. |
Summary | false |
Fixed Value | http://nphcda.gov.ng/ig/immunization/StructureDefinition/ng-encounter-signature |
6. Extension.value[x] | |
Definition | Value of extension - must be one of a constrained set of the data types (see Extensibility for a list). |
Short | Value of extension |
Control | 10..1 |
Type | Signature, date, Meta, Address, Attachment, integer, Count, DataRequirement, Dosage, uuid, Identifier, Coding, SampledData, id, positiveInt, Distance, Period, Duration, canonical, Range, RelatedArtifact, base64Binary, UsageContext, Timing, decimal, CodeableConcept, ParameterDefinition, dateTime, code, string, Contributor, oid, instant, ContactPoint, HumanName, Money, markdown, Ratio, Age, Reference, TriggerDefinition, Quantity, uri, url, Annotation, ContactDetail, boolean, Expression, unsignedInt, time |
[x] Note | SeeChoice of Data Typesfor further information about how to use [x] |
Is Modifier | false |
Must Support | true |
Summary | false |
Invariants | ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count())) |
8. Extension.value[x].type | |
Definition | An indication of the reason that the entity signed this document. This may be explicitly included as part of the signature information and can be used when determining accountability for various actions concerning the document. |
Short | Indication of the reason the entity signed the object(s) |
Comments | Examples include attesting to: authorship, correct transcription, and witness of specific event. Also known as a "Commitment Type Indication". |
Control | 1..* |
Binding | The codes SHOULD be taken from SignatureTypeCodeshttp://hl7.org/fhir/ValueSet/signature-type|4.0.1 (preferred to http://hl7.org/fhir/ValueSet/signature-type|4.0.1 )An indication of the reason that an entity signed the object. |
Type | Coding |
Is Modifier | false |
Summary | true |
Invariants | ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count())) |
10. Extension.value[x].when | |
Definition | When the digital signature was signed. |
Short | When the signature was created |
Comments | This should agree with the information in the signature. |
Control | 1..1 |
Type | instant |
Is Modifier | false |
Primitive Value | This primitive element may be present, or absent, or replaced by an extension |
Must Support | true |
Summary | true |
Invariants | ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count())) |
12. Extension.value[x].who | |
Definition | A reference to an application-usable description of the identity that signed (e.g. the signature used their private key). |
Short | Who signed |
Comments | This should agree with the information in the signature. |
Control | 1..1 |
Type | Reference(Practitioner, PractitionerRole, RelatedPerson, Patient, Device, Organization) |
Is Modifier | false |
Must Support | true |
Must Support Types | No must-support rules about the choice of types/profiles |
Summary | true |
Invariants | ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count())) |
Guidance on how to interpret the contents of this table can be foundhere
0. Extension | |
Definition | A digital or electronic signature capturing who signed, when, type, and signature data. Extension to capture the practitioner's digital signature on an Encounter resource. |
Short | NG-Imm Encounter Signature |
Control | 0..* This element is affected by the following invariants: ele-1 |
Is Modifier | false |
Invariants | ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()) )ext-1: Must have either extensions or value[x], not both ( extension.exists() != value.exists() ) |
2. Extension.id | |
Definition | Unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces. |
Short | Unique id for inter-element referencing |
Control | 0..1 |
Type | string |
Is Modifier | false |
XML Format | In the XML format, this property is represented as an attribute. |
Summary | false |
4. Extension.extension | |
Definition | An Extension |
Short | Extension |
Control | 0..0 |
Type | Extension |
Is Modifier | false |
Summary | false |
Invariants | ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()) )ext-1: Must have either extensions or value[x], not both ( extension.exists() != value.exists() ) |
Slicing | This element introduces a set of slices on Extension.extension . The slices areUnordered and Open, and can be differentiated using the following discriminators: |
6. Extension.url | |
Definition | Source of the definition for the extension code - a logical name or a URL. |
Short | identifies the meaning of the extension |
Comments | 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. |
Control | 1..1 |
Type | uri |
Is Modifier | false |
XML Format | In the XML format, this property is represented as an attribute. |
Summary | false |
Fixed Value | http://nphcda.gov.ng/ig/immunization/StructureDefinition/ng-encounter-signature |
8. Extension.value[x] | |
Definition | Value of extension - must be one of a constrained set of the data types (see Extensibility for a list). |
Short | Value of extension |
Control | 1..1 |
Type | Signature |
[x] Note | SeeChoice of Data Typesfor further information about how to use [x] |
Is Modifier | false |
Must Support | true |
Summary | false |
Invariants | ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()) ) |
10. Extension.value[x].id | |
Definition | Unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces. |
Short | Unique id for inter-element referencing |
Control | 0..1 |
Type | string |
Is Modifier | false |
XML Format | In the XML format, this property is represented as an attribute. |
Summary | false |
12. Extension.value[x].extension | |
Definition | 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. |
Short | Additional content defined by implementations |
Comments | 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. |
Control | 0..* |
Type | Extension |
Is Modifier | false |
Summary | false |
Alternate Names | extensions, user content |
Invariants | ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()) )ext-1: Must have either extensions or value[x], not both ( extension.exists() != value.exists() ) |
Slicing | This element introduces a set of slices on Extension.value[x].extension . The slices areUnordered and Open, and can be differentiated using the following discriminators: |
14. Extension.value[x].type | |
Definition | An indication of the reason that the entity signed this document. This may be explicitly included as part of the signature information and can be used when determining accountability for various actions concerning the document. |
Short | Indication of the reason the entity signed the object(s) |
Comments | Examples include attesting to: authorship, correct transcription, and witness of specific event. Also known as a "Commitment Type Indication". |
Control | 1..* |
Binding | The codes SHOULD be taken from SignatureTypeCodes (preferred to http://hl7.org/fhir/ValueSet/signature-type|4.0.1 )An indication of the reason that an entity signed the object. |
Type | Coding |
Is Modifier | false |
Summary | true |
Invariants | ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()) ) |
16. Extension.value[x].when | |
Definition | When the digital signature was signed. |
Short | When the signature was created |
Comments | This should agree with the information in the signature. |
Control | 1..1 |
Type | instant |
Is Modifier | false |
Primitive Value | This primitive element may be present, or absent, or replaced by an extension |
Must Support | true |
Summary | true |
Invariants | ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()) ) |
18. Extension.value[x].who | |
Definition | A reference to an application-usable description of the identity that signed (e.g. the signature used their private key). |
Short | Who signed |
Comments | This should agree with the information in the signature. |
Control | 1..1 |
Type | Reference(Practitioner, PractitionerRole, RelatedPerson, Patient, Device, Organization) |
Is Modifier | false |
Must Support | true |
Must Support Types | No must-support rules about the choice of types/profiles |
Summary | true |
Invariants | ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()) ) |
20. Extension.value[x].onBehalfOf | |
Definition | A reference to an application-usable description of the identity that is represented by the signature. |
Short | The party represented |
Comments | The party that can't sign. For example a child. |
Control | 0..1 |
Type | Reference(Practitioner, PractitionerRole, RelatedPerson, Patient, Device, Organization) |
Is Modifier | false |
Summary | true |
Requirements | used when the signature is on behalf of a non-signer. |
Invariants | ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()) ) |
22. Extension.value[x].targetFormat | |
Definition | A mime type that indicates the technical format of the target resources signed by the signature. |
Short | The technical format of the signed resources |
Comments | "xml", "json" and "ttl" are allowed, which describe the simple encodings described in the specification (and imply appropriate bundle support). Otherwise, mime types are legal here. |
Control | 0..1 |
Binding | The codes SHALL be taken from Mime Types (required to http://hl7.org/fhir/ValueSet/mimetypes|4.0.1 )The mime type of an attachment. Any valid mime type is allowed. |
Type | code |
Is Modifier | false |
Primitive Value | This primitive element may be present, or absent, or replaced by an extension |
Summary | false |
Invariants | ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()) ) |
24. Extension.value[x].sigFormat | |
Definition | A mime type that indicates the technical format of the signature. Important mime types are application/signature+xml for X ML DigSig, application/jose for JWS, and image/* for a graphical image of a signature, etc. |
Short | The technical format of the signature |
Control | 0..1 |
Binding | The codes SHALL be taken from Mime Types (required to http://hl7.org/fhir/ValueSet/mimetypes|4.0.1 )The mime type of an attachment. Any valid mime type is allowed. |
Type | code |
Is Modifier | false |
Primitive Value | This primitive element may be present, or absent, or replaced by an extension |
Summary | false |
Invariants | ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()) ) |
26. Extension.value[x].data | |
Definition | The base64 encoding of the Signature content. When signature is not recorded electronically this element would be empty. |
Short | The actual signature content (XML DigSig. JWS, picture, etc.) |
Comments | Where the signature type is an XML DigSig, the signed content is a FHIR Resource(s), the signature is of the XML form of the Resource(s) using XML-Signature (XMLDIG) "Detached Signature" form. |
Control | 0..1 |
Type | base64Binary |
Is Modifier | false |
Primitive Value | This primitive element may be present, or absent, or replaced by an extension |
Summary | false |
Invariants | ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()) ) |