All extensions in this list are defined in this specification and have a base URI of http://hl7.org/fhir/StructureDefinition/. Additional extensions can be
registered on the HL7 FHIR registry at http://hl7.org/fhir/registry 
.
| Identity | Conf. | Type | Context | FMM |
| capabilities | 0..* | code | CapabilityStatement.rest.security | 1 |
| oauth-uris | 0..1 | (complex) | CapabilityStatement.rest.security | 1 |
| 11179-objectClass | 0..1 | Coding | ElementDefinition.mapping | 1 |
| 11179-objectClassProperty | 0..1 | Coding | ElementDefinition.mapping | 1 |
| 11179-permitted-value-conceptmap | 0..1 | canonical | StructureDefinition.snapshot.element.binding.valueSet,
StructureDefinition.differential.element.binding.valueSet,
Questionnaire.item.answerValueSet | 1 |
| 11179-permitted-value-valueset | 0..1 | canonical | StructureDefinition.snapshot.element.binding.valueSet,
StructureDefinition.differential.element.binding.valueSet,
Questionnaire.item.answerValueSet | 1 |
| bodySite | 0..1 | Reference | Element | 1 |
| coding-sctdescid | 0..1 | id | Coding | 1 |
| contactpoint-area | 0..1 | string | ContactPoint | 1 |
| contactpoint-country | 0..1 | string | ContactPoint | 1 |
| contactpoint-extension | 0..1 | string | ContactPoint | 1 |
| contactpoint-local | 0..1 | string | ContactPoint | 1 |
| cqf-calculatedValue | 0..* | string | Element | 1 |
| cqf-cdsHooksEndpoint | 0..1 | uri | PlanDefinition | 1 |
| cqf-certainty | 0..* | (complex) | Element | 1 |
| cqf-citation | 0..1 | string | Attachment | 1 |
| cqf-contactAddress | 0..1 | Address | ContactDetail | 1 |
| cqf-contactReference | 0..1 | Reference | ContactDetail | 1 |
| cqf-contributionTime | 0..1 | dateTime | ContactDetail | 1 |
| cqf-encounterClass | 0..1 | CodeableConcept | Basic | 1 |
| cqf-encounterType | 0..1 | CodeableConcept | Basic | 1 |
| cqf-expression | 0..* | Expression | Element | 1 |
| cqf-initialValue | 0..* | string | Element | 1 |
| cqf-initiatingOrganization | 0..1 | Reference | Basic | 1 |
| cqf-initiatingPerson | 0..1 | Reference | Basic | 1 |
| cqf-library | 0..* | canonical | Element | 1 |
| cqf-measureInfo | 0..* | (complex) | Element | 1 |
| cqf-qualityOfEvidence | 0..1 | CodeableConcept | Attachment | 1 |
| cqf-receivingOrganization | 0..1 | Reference | Basic | 1 |
| cqf-receivingPerson | 0..1 | Reference | Basic | 1 |
| cqf-recipientLanguage | 0..1 | CodeableConcept | Basic | 1 |
| cqf-recipientType | 0..1 | CodeableConcept | Basic | 1 |
| cqf-relativeDateTime | 0..1 | (complex) | Element | 1 |
| cqf-strengthOfRecommendation | 0..1 | CodeableConcept | Attachment | 1 |
| cqf-systemUserLanguage | 0..1 | CodeableConcept | Basic | 1 |
| cqf-systemUserTaskContext | 0..1 | CodeableConcept | Basic | 1 |
| cqf-systemUserType | 0..1 | CodeableConcept | Basic | 1 |
| data-absent-reason | 0..1 | code | Element | 1 |
| designNote | 0..1 | markdown | Questionnaire,
Questionnaire.item,
Questionnaire.item.item,
ElementDefinition | 1 |
| display | 0..1 | string | canonical | 1 |
| dosage-conditions | 0..* | (complex) | Dosage | 1 |
| elementdefinition-allowedUnits | 0..1 | (Choice) | ElementDefinition | 1 |
| elementdefinition-bestpractice | 0..1 | (Choice) | ElementDefinition.constraint | 1 |
| elementdefinition-bestpractice-explanation | 0..1 | markdown | ElementDefinition.constraint | 1 |
| elementdefinition-bindingName | 0..1 | string | ElementDefinition.binding | 1 |
| elementdefinition-equivalence | 0..1 | code | ElementDefinition.mapping | 1 |
| elementdefinition-identifier | 0..* | Identifier | ElementDefinition | 1 |
| elementdefinition-inheritedExtensibleValueSet | 0..* | (Choice) | ElementDefinition.binding | 1 |
| elementdefinition-isCommonBinding | 0..1 | boolean | ElementDefinition.binding | 1 |
| elementdefinition-maxValueSet | 0..1 | (Choice) | ElementDefinition.binding | 1 |
| elementdefinition-minValueSet | 0..1 | (Choice) | ElementDefinition.binding | 1 |
| elementdefinition-namespace | 0..1 | uri | ElementDefinition,
StructureDefinition | 1 |
| elementdefinition-pattern | 0..1 | canonical | ElementDefinition.type | 1 |
| elementdefinition-profile-element | 0..1 | string | ElementDefinition.type.profile | 1 |
| elementdefinition-question | 0..* | string | ElementDefinition | 1 |
| elementdefinition-selector | 0..1 | string | ElementDefinition | 1 |
| elementdefinition-translatable | 0..1 | boolean | ElementDefinition | 1 |
| elementdefinition-type-must-support | 0..1 | boolean | ElementDefinition.type,
ElementDefinition.type.profile,
ElementDefinition.type.targetProfile | 1 |
| entryFormat | 0..1 | string | Questionnaire.item,
ElementDefinition | 1 |
| event-basedOn | 0..* | Reference | Condition | 1 |
| event-eventHistory | 0..* | Reference | Observation,
DiagnosticReport,
Task,
SupplyDelivery,
DeviceUseStatement | 1 |
| event-location | 0..1 | Reference | Observation,
DiagnosticReport,
DocumentReference,
SupplyDelivery | 1 |
| event-partOf | 0..* | Reference | DiagnosticReport,
Condition | 1 |
| event-performerFunction | 0..1 | CodeableConcept | Observation.performer,
DiagnosticReport.performer,
DocumentReference.author,
Consent.performer | 1 |
| event-statusReason | 0..1 | CodeableConcept | Observation,
DiagnosticReport,
DocumentReference,
SupplyDelivery,
DeviceUseStatement | 1 |
| geolocation | 0..1 | (complex) | Address | 1 |
| humanname-assembly-order | 0..1 | code | HumanName | 1 |
| humanname-fathers-family | 0..* | string | HumanName.family | 1 |
| humanname-mothers-family | 0..* | string | HumanName.family | 1 |
| humanname-own-name | 0..1 | string | HumanName.family | 1 |
| humanname-own-prefix | 0..1 | string | HumanName.family | 1 |
| humanname-partner-name | 0..1 | string | HumanName.family | 1 |
| humanname-partner-prefix | 0..1 | string | HumanName.family | 1 |
| identifier-validDate | 0..* | dateTime | Identifier | 1 |
| iso21090-AD-use | 0..1 | code | Address | 1 |
| iso21090-ADXP-additionalLocator | 0..* | string | Address.line | 1 |
| iso21090-ADXP-buildingNumberSuffix | 0..* | string | Address.line | 1 |
| iso21090-ADXP-careOf | 0..* | string | Address.line | 1 |
| iso21090-ADXP-censusTract | 0..* | string | Address.line | 1 |
| iso21090-ADXP-delimiter | 0..* | string | Address.line | 1 |
| iso21090-ADXP-deliveryAddressLine | 0..* | string | Address.line | 1 |
| iso21090-ADXP-deliveryInstallationArea | 0..* | string | Address.line | 1 |
| iso21090-ADXP-deliveryInstallationQualifier | 0..* | string | Address.line | 1 |
| iso21090-ADXP-deliveryInstallationType | 0..* | string | Address.line | 1 |
| iso21090-ADXP-deliveryMode | 0..* | string | Address.line | 1 |
| iso21090-ADXP-deliveryModeIdentifier | 0..* | string | Address.line | 1 |
| iso21090-ADXP-direction | 0..* | string | Address.line | 1 |
| iso21090-ADXP-houseNumber | 0..* | string | Address.line | 1 |
| iso21090-ADXP-houseNumberNumeric | 0..* | string | Address.line | 1 |
| iso21090-ADXP-postBox | 0..* | string | Address.line | 1 |
| iso21090-ADXP-precinct | 0..* | string | Address | 1 |
| iso21090-ADXP-streetAddressLine | 0..* | string | Address.line | 1 |
| iso21090-ADXP-streetName | 0..* | string | Address.line | 1 |
| iso21090-ADXP-streetNameBase | 0..* | string | Address.line | 1 |
| iso21090-ADXP-streetNameType | 0..* | string | Address.line | 1 |
| iso21090-ADXP-unitID | 0..* | string | Address.line | 1 |
| iso21090-ADXP-unitType | 0..* | string | Address.line | 1 |
| iso21090-EN-qualifier | 0..* | code | HumanName.family,
HumanName.given,
HumanName.prefix,
HumanName.suffix | 1 |
| iso21090-EN-representation | 0..1 | code | HumanName | 1 |
| iso21090-EN-use | 0..1 | code | HumanName | 1 |
| iso21090-PQ-translation | 0..* | Quantity | Quantity | 1 |
| iso21090-SC-coding | 0..* | Coding | string | 1 |
| iso21090-TEL-address | 0..1 | url | ContactPoint | 1 |
| iso21090-nullFlavor | 0..1 | code | Element | 1 |
| iso21090-preferred | 0..1 | boolean | Element | 1 |
| iso21090-uncertainty | 0..1 | decimal | Quantity | 1 |
| iso21090-uncertaintyType | 0..1 | code | Quantity | 1 |
| language | 1..1 | code | HumanName,
Address,
Annotation | 1 |
| maxDecimalPlaces | 0..1 | integer | Questionnaire.item,
ElementDefinition | 1 |
| maxSize | 0..1 | decimal | Questionnaire.item,
ElementDefinition | 1 |
| maxValue | 0..1 | (Choice) | Questionnaire.item | 1 |
| mimeType | 0..* | code | Questionnaire.item,
ElementDefinition | 1 |
| minLength | 0..1 | integer | Questionnaire.item,
ElementDefinition | 1 |
| minValue | 0..1 | (Choice) | Questionnaire.item | 1 |
| narrativeLink | 0..1 | url | Element | 1 |
| ordinalValue | 0..1 | decimal | Coding,
Questionnaire.item.answerOption,
CodeSystem.concept,
ValueSet.compose.include.concept | 1 |
| originalText | 0..1 | string | Element | 1 |
| quantity-precision | 0..1 | integer | decimal | 1 |
| regex | 0..1 | string | Questionnaire.item,
ElementDefinition | 1 |
| relative-date | 0..1 | (complex) | date,
dateTime | 1 |
| rendered-value | 0..1 | string | Identifier.value,
date,
dateTime,
time,
instant,
integer,
decimal,
string,
code,
canonical | 1 |
| rendering-markdown | 0..1 | markdown | string | 1 |
| rendering-style | 0..1 | string | Element | 1 |
| rendering-styleSensitive | 0..1 | boolean | Element | 1 |
| rendering-xhtml | 0..1 | string | string | 1 |
| replaces | 0..* | canonical | ActivityDefinition,
CapabilityStatement,
CapabilityStatement2,
ChargeItemDefinition,
Citation,
CodeSystem,
CompartmentDefinition,
ConceptMap,
ConditionDefinition,
EventDefinition,
Evidence,
EvidenceReport,
EvidenceVariable,
ExampleScenario,
GraphDefinition,
ImplementationGuide,
Library,
Measure,
MessageDefinition,
NamingSystem,
OperationDefinition,
PlanDefinition,
Questionnaire,
SearchParameter,
StructureDefinition,
StructureMap,
TerminologyCapabilities,
TestScript,
ValueSet | 1 |
| request-doNotPerform | 0..1 M | boolean | NutritionOrder | 1 |
| request-insurance | 0..* | Reference | NutritionOrder | 1 |
| request-performerOrder | 0..1 | integer | ServiceRequest.performer | 1 |
| request-relevantHistory | 0..* | Reference | NutritionOrder,
CommunicationRequest | 1 |
| request-replaces | 0..* | Reference | NutritionOrder | 1 |
| request-statusReason | 0..1 | CodeableConcept | DeviceRequest,
ServiceRequest,
NutritionOrder,
SupplyRequest | 1 |
| timing-dayOfMonth | 0..* | positiveInt | Timing.repeat | 1 |
| timing-daysOfCycle | 1..1 | (complex) | PlanDefinition.action,
RequestGroup.action | 1 |
| timing-exact | 0..1 | boolean | Timing.repeat | 1 |
| translation | 0..* | (complex) | string,
code,
markdown | 1 |
| tz-code | 0..1 | code | date,
dateTime,
instant | 1 |
| tz-offset | 0..1 | string | date | 1 |
| usagecontext-group | 0..1 | string | UsageContext | 1 |
| variable | 0..* | Expression | Questionnaire,
Questionnaire.item,
Questionnaire.item.item | 1 |
| workflow-episodeOfCare | 0..* | Reference | Observation,
DiagnosticReport,
DocumentReference,
DeviceRequest,
ServiceRequest,
NutritionOrder,
DeviceUseStatement,
AdverseEvent,
CarePlan,
ClinicalImpression,
Communication,
CommunicationRequest,
Condition,
Procedure,
QuestionnaireResponse | 1 |
| workflow-instantiatesCanonical | 0..* | canonical | Observation,
DiagnosticReport,
DocumentReference,
Condition,
SupplyDelivery,
CommunicationRequest,
SupplyRequest | 1 |
| workflow-instantiatesUri | 0..* | uri | Observation,
DiagnosticReport,
DocumentReference,
Condition,
SupplyDelivery,
CommunicationRequest,
SupplyRequest | 1 |
| workflow-reasonCode | 0..* | CodeableConcept | Observation,
DiagnosticReport,
DocumentReference,
NutritionOrder | 1 |
| workflow-reasonReference | 0..* | Reference | Observation,
DiagnosticReport,
DocumentReference,
NutritionOrder | 1 |
| workflow-relatedArtifact | 0..* | RelatedArtifact | DiagnosticReport,
Observation | 1 |
| workflow-researchStudy | 0..* | Reference | Composition,
Consent,
DeviceUseStatement,
DiagnosticReport,
Encounter,
FamilyMemberHistory,
Immunization,
DocumentReference,
MedicationAdministration,
MedicationDispense,
MedicationUsage,
Observation,
Procedure,
QuestionnaireResponse,
RiskAssessment,
SupplyDelivery,
Task | 1 |
| workflow-supportingInfo | 0..* | Reference | DiagnosticReport,
Observation,
CommunicationRequest | 1 |
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