<status value="draft"/> <date value="2026-06-18T12:04:51+00:00"/> <publisher value="Selina Adlberger"/> <description value="Cryptographic signature or verification hash to ensure the integrity, accountability, and non-repudiation of the AI execution audit log."/> <fhirVersion value="5.0.0"/> <mapping> <identity value="rim"/> <uri value="http://hl7.org/v3"/> <name value="RIM Mapping"/> </mapping> <kind value="complex-type"/> <abstract value="false"/> <context> <type value="element"/> <expression value="AuditEvent"/> </context> <type value="Extension"/> <baseDefinition value="http://hl7.org/fhir/StructureDefinition/Extension"/> <derivation value="constraint"/> <snapshot> <extension url="http://hl7.org/fhir/tools/StructureDefinition/snapshot-base-version"> <valueString value="5.0.0"/> </extension> <element id="Extension"> <path value="Extension"/> <short value="EU AI Act Log Integrity Signature"/> <definition value="Cryptographic signature or verification hash to ensure the integrity, accountability, and non-repudiation of the AI execution audit log."/> <min value="0"/> <max value="*"/> <base> <path value="Extension"/> <min value="0"/> <max value="*"/> </base> <constraint> <key value="ele-1"/> <severity value="error"/> <human value="All FHIR elements must have a @value or children"/> <expression value="hasValue() or (children().count() > id.count())"/> <source value="http://hl7.org/fhir/StructureDefinition/Element"/> </constraint> <constraint> <key value="ext-1"/> <severity value="error"/> <human value="Must have either extensions or value[x], not both"/> <expression value="extension.exists() != value.exists()"/> <source value="http://hl7.org/fhir/StructureDefinition/Extension"/> </constraint> <isModifier value="false"/> </element> <element id="Extension.id"> <path value="Extension.id"/> <representation value="xmlAttr"/> <short value="Unique id for inter-element referencing"/> <definition value="Unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces."/> <min value="0"/> <max value="1"/> <base> <path value="Element.id"/> <min value="0"/> <max value="1"/> </base> <type> <extension url="http://hl7.org/fhir/StructureDefinition/structuredefinition-fhir-type"> <valueUrl value="id"/> </extension> <code value="http://hl7.org/fhirpath/System.String"/> </type> <condition value="ele-1"/> <isModifier value="false"/> <isSummary value="false"/> <mapping> <identity value="rim"/> <map value="n/a"/> </mapping> </element> <element id="Extension.extension"> <path value="Extension.extension"/> <slicing> <discriminator> <type value="value"/> <path value="url"/> </discriminator> <description value="Extensions are always sliced by (at least) url"/> <rules value="open"/> </slicing> <short value="Extension"/> <definition value="An Extension"/> <min value="0"/> <max value="0"/> <base> <path value="Element.extension"/> <min value="0"/> <max value="*"/> </base> <type> <code value="Extension"/> </type> <constraint> <key value="ele-1"/> <severity value="error"/> <human value="All FHIR elements must have a @value or children"/> <expression value="hasValue() or (children().count() > id.count())"/> <source value="http://hl7.org/fhir/StructureDefinition/Element"/> </constraint> <constraint> <key value="ext-1"/> <severity value="error"/> <human value="Must have either extensions or value[x], not both"/> <expression value="extension.exists() != value.exists()"/> <source value="http://hl7.org/fhir/StructureDefinition/Extension"/> </constraint> <isModifier value="false"/> <isSummary value="false"/> </element> <element id="Extension.url"> <path value="Extension.url"/> <representation value="xmlAttr"/> <short value="identifies the meaning of the extension"/> <definition value="Source of the definition for the extension code - a logical name or a URL."/> <comment value="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."/> <min value="1"/> <max value="1"/> <base> <path value="Extension.url"/> <min value="1"/> <max value="1"/> </base> <type> <extension url="http://hl7.org/fhir/StructureDefinition/structuredefinition-fhir-type"> <valueUrl value="uri"/> </extension> <code value="http://hl7.org/fhirpath/System.String"/> </type> <fixedUri value="http://example.org/fhir/eu-ai-transparency/StructureDefinition/eu-ai-log-integrity"/> <isModifier value="false"/> <isSummary value="false"/> <mapping> <identity value="rim"/> <map value="N/A"/> </mapping> </element> <element id="Extension.value[x]"> <path value="Extension.value[x]"/> <short value="Value of extension"/> <definition value="Value of extension - must be one of a constrained set of the data types (see [Extensibility](http://hl7.org/fhir/R5/extensibility.html) for a list)."/> <min value="1"/> <max value="1"/> <base> <path value="Extension.value[x]"/> <min value="0"/> <max value="1"/> </base> <type> <code value="Signature"/> </type> <condition value="ext-1"/> <constraint> <key value="ele-1"/> <severity value="error"/> <human value="All FHIR elements must have a @value or children"/> <expression value="hasValue() or (children().count() > id.count())"/> <source value="http://hl7.org/fhir/StructureDefinition/Element"/> </constraint> <isModifier value="false"/> <isSummary value="false"/> <mapping> <identity value="rim"/> <map value="N/A"/> </mapping> </element> <element id="Extension.value[x].id"> <path value="Extension.value[x].id"/> <representation value="xmlAttr"/> <short value="Unique id for inter-element referencing"/> <definition value="Unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces."/> <min value="0"/> <max value="1"/> <base> <path value="Element.id"/> <min value="0"/> <max value="1"/> </base> <type> <extension url="http://hl7.org/fhir/StructureDefinition/structuredefinition-fhir-type"> <valueUrl value="id"/> </extension> <code value="http://hl7.org/fhirpath/System.String"/> </type> <condition value="ele-1"/> <isModifier value="false"/> <isSummary value="false"/> <mapping> <identity value="rim"/> <map value="n/a"/> </mapping> </element> <element id="Extension.value[x].extension"> <path value="Extension.value[x].extension"/> <slicing> <discriminator> <type value="value"/> <path value="url"/> </discriminator> <description value="Extensions are always sliced by (at least) url"/> <rules value="open"/> </slicing> <short value="Additional content defined by implementations"/> <definition value="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 managable, 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."/> <comment value="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."/> <alias value="extensions"/> <alias value="user content"/> <min value="0"/> <max value="*"/> <base> <path value="Element.extension"/> <min value="0"/> <max value="*"/> </base> <type> <code value="Extension"/> </type> <constraint> <key value="ele-1"/> <severity value="error"/> <human value="All FHIR elements must have a @value or children"/> <expression value="hasValue() or (children().count() > id.count())"/> <source value="http://hl7.org/fhir/StructureDefinition/Element"/> </constraint> <constraint> <key value="ext-1"/> <severity value="error"/> <human value="Must have either extensions or value[x], not both"/> <expression value="extension.exists() != value.exists()"/> <source value="http://hl7.org/fhir/StructureDefinition/Extension"/> </constraint> <isModifier value="false"/> <isSummary value="false"/> <mapping> <identity value="rim"/> <map value="n/a"/> </mapping> </element> <element id="Extension.value[x].type"> <path value="Extension.value[x].type"/> <short value="Indication of the reason the entity signed the object(s)"/> <definition value="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."/> <comment value="Examples include attesting to: authorship, correct transcription, and witness of specific event. Also known as a "Commitment Type Indication"."/> <min value="1"/> <max value="*"/> <base> <path value="Signature.type"/> <min value="0"/> <max value="*"/> </base> <type> <code value="Coding"/> </type> <constraint> <key value="ele-1"/> <severity value="error"/> <human value="All FHIR elements must have a @value or children"/> <expression value="hasValue() or (children().count() > id.count())"/> <source value="http://hl7.org/fhir/StructureDefinition/Element"/> </constraint> <isModifier value="false"/> <isSummary value="true"/> <binding> <extension url="http://hl7.org/fhir/StructureDefinition/elementdefinition-bindingName"> <valueString value="SignatureType"/> </extension> <strength value="preferred"/> <description value="An indication of the reason that an entity signed the object."/> <valueSet value="http://hl7.org/fhir/ValueSet/signature-type|5.0.0"/> </binding> </element> <element id="Extension.value[x].when"> <path value="Extension.value[x].when"/> <short value="When the signature was created"/> <definition value="When the digital signature was signed."/> <comment value="This should agree with the information in the signature."/> <min value="1"/> <max value="1"/> <base> <path value="Signature.when"/> <min value="0"/> <max value="1"/> </base> <type> <code value="instant"/> </type> <constraint> <key value="ele-1"/> <severity value="error"/> <human value="All FHIR elements must have a @value or children"/> <expression value="hasValue() or (children().count() > id.count())"/> <source value="http://hl7.org/fhir/StructureDefinition/Element"/> </constraint> <isModifier value="false"/> <isSummary value="true"/> </element> <element id="Extension.value[x].who"> <path value="Extension.value[x].who"/> <short value="Who signed"/> <definition value="A reference to an application-usable description of the identity that signed (e.g. the signature used their private key)."/> <comment value="This should agree with the information in the signature."/> <min value="0"/> <max value="1"/> <base> <path value="Signature.who"/> <min value="0"/> <max value="1"/> </base> <type> <code value="Reference"/> <targetProfile value="http://hl7.org/fhir/StructureDefinition/Device"/> </type> <constraint> <key value="ele-1"/> <severity value="error"/> <human value="All FHIR elements must have a @value or children"/> <expression value="hasValue() or (children().count() > id.count())"/> <source value="http://hl7.org/fhir/StructureDefinition/Element"/> </constraint> <isModifier value="false"/> <isSummary value="true"/> </element> <element id="Extension.value[x].onBehalfOf"> <path value="Extension.value[x].onBehalfOf"/> <short value="The party represented"/> <definition value="A reference to an application-usable description of the identity that is represented by the signature."/> <comment value="The party that can't sign. For example a child."/> <requirements value="used when the signature is on behalf of a non-signer."/> <min value="0"/> <max value="1"/> <base> <path value="Signature.onBehalfOf"/> <min value="0"/> <max value="1"/> </base> <type> <code value="Reference"/> <targetProfile value="http://hl7.org/fhir/StructureDefinition/Practitioner|5.0.0"/> <targetProfile value="http://hl7.org/fhir/StructureDefinition/PractitionerRole|5.0.0"/> <targetProfile value="http://hl7.org/fhir/StructureDefinition/RelatedPerson|5.0.0"/> <targetProfile value="http://hl7.org/fhir/StructureDefinition/Patient|5.0.0"/> <targetProfile value="http://hl7.org/fhir/StructureDefinition/Device|5.0.0"/> <targetProfile value="http://hl7.org/fhir/StructureDefinition/Organization|5.0.0"/> </type> <constraint> <key value="ele-1"/> <severity value="error"/> <human value="All FHIR elements must have a @value or children"/> <expression value="hasValue() or (children().count() > id.count())"/> <source value="http://hl7.org/fhir/StructureDefinition/Element"/> </constraint> <isModifier value="false"/> <isSummary value="true"/> </element> <element id="Extension.value[x].targetFormat"> <path value="Extension.value[x].targetFormat"/> <short value="The technical format of the signed resources"/> <definition value="A mime type that indicates the technical format of the target resources signed by the signature."/> <comment value=""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."/> <min value="0"/> <max value="1"/> <base> <path value="Signature.targetFormat"/> <min value="0"/> <max value="1"/> </base> <type> <code value="code"/> </type> <constraint> <key value="ele-1"/> <severity value="error"/> <human value="All FHIR elements must have a @value or children"/> <expression value="hasValue() or (children().count() > id.count())"/> <source value="http://hl7.org/fhir/StructureDefinition/Element"/> </constraint> <isModifier value="false"/> <isSummary value="false"/> <binding> <extension url="http://hl7.org/fhir/StructureDefinition/elementdefinition-bindingName"> <valueString value="MimeType"/> </extension> <strength value="required"/> <description value="BCP 13 (RFCs 2045, 2046, 2047, 4288, 4289 and 2049)"/> <valueSet value="http://hl7.org/fhir/ValueSet/mimetypes|5.0.0"/> </binding> </element> <element id="Extension.value[x].sigFormat"> <path value="Extension.value[x].sigFormat"/> <short value="The technical format of the signature"/> <definition value="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."/> <min value="0"/> <max value="1"/> <base> <path value="Signature.sigFormat"/> <min value="0"/> <max value="1"/> </base> <type> <code value="code"/> </type> <constraint> <key value="ele-1"/> <severity value="error"/> <human value="All FHIR elements must have a @value or children"/> <expression value="hasValue() or (children().count() > id.count())"/> <source value="http://hl7.org/fhir/StructureDefinition/Element"/> </constraint> <isModifier value="false"/> <isSummary value="false"/> <binding> <extension url="http://hl7.org/fhir/StructureDefinition/elementdefinition-bindingName"> <valueString value="MimeType"/> </extension> <strength value="required"/> <description value="BCP 13 (RFCs 2045, 2046, 2047, 4288, 4289 and 2049)"/> <valueSet value="http://hl7.org/fhir/ValueSet/mimetypes|5.0.0"/> </binding> </element> <element id="Extension.value[x].data"> <path value="Extension.value[x].data"/> <short value="The actual signature content (XML DigSig. JWS, picture, etc.)"/> <definition value="The base64 encoding of the Signature content. When signature is not recorded electronically this element would be empty."/> <comment value="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."/> <min value="1"/> <max value="1"/> <base> <path value="Signature.data"/> <min value="0"/> <max value="1"/> </base> <type> <code value="base64Binary"/> </type> <constraint> <key value="ele-1"/> <severity value="error"/> <human value="All FHIR elements must have a @value or children"/> <expression value="hasValue() or (children().count() > id.count())"/> <source value="http://hl7.org/fhir/StructureDefinition/Element"/> </constraint> <isModifier value="false"/> <isSummary value="false"/> </element> </snapshot> <differential> <element id="Extension"> <path value="Extension"/> <short value="EU AI Act Log Integrity Signature"/> <definition value="Cryptographic signature or verification hash to ensure the integrity, accountability, and non-repudiation of the AI execution audit log."/> </element> <element id="Extension.extension"> <path value="Extension.extension"/> <max value="0"/> </element> <element id="Extension.url"> <path value="Extension.url"/> <fixedUri value="http://example.org/fhir/eu-ai-transparency/StructureDefinition/eu-ai-log-integrity"/> </element> <element id="Extension.value[x]"> <path value="Extension.value[x]"/> <min value="1"/> <type> <code value="Signature"/> </type> </element> <element id="Extension.value[x].type"> <path value="Extension.value[x].type"/> <min value="1"/> </element> <element id="Extension.value[x].when"> <path value="Extension.value[x].when"/> <min value="1"/> </element> <element id="Extension.value[x].who"> <path value="Extension.value[x].who"/> <type> <code value="Reference"/> <targetProfile value="http://hl7.org/fhir/StructureDefinition/Device"/> </type> </element> <element id="Extension.value[x].data"> <path value="Extension.value[x].data"/> <min value="1"/> </element> </differential> </StructureDefinition>

Generated Narrative: StructureDefinition eu-ai-log-integrity

Name	Card.	Type	Description & Constraints
Extension	0..*	Extension	EU AI Act Log Integrity Signature
extension	0..0		Extension
url	1..1	uri	"http://example.org/fhir/eu-ai-transparency/StructureDefinition/eu-ai-log-integrity"
value[x]	1..1	Signature	Value of extension
type	1..*	Coding	Indication of the reason the entity signed the object(s)
when	1..1	instant	When the signature was created
who	0..1	Reference(Device)	Who signed
data	1..1	base64Binary	The actual signature content (XML DigSig. JWS, picture, etc.)
Documentation for this format