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| Package | Version | Identity | Name/Title | Status | FMM | WG | Date | Realm | DataType | Usage # |
|---|---|---|---|---|---|---|---|---|---|---|
| hl7.fhir.us.davinci-pas | R4 | StructureDefinition-extension-authorizedProviderType.json | Authorized Provider Type | trial-use | 4 | fm | 2026-03 | us | Extension | 2 |
| hl7.fhir.uv.extensions | R5 | StructureDefinition-cqf-encounterType.json | Encounter type | deprecated | 3 | cds | 2015-05 | uv | Extension | |
| fhir.argonaut.scheduling | R3 | StructureDefinition-extension-subscription-eventfocus.json | Subscription Event Focus Extension | active | 2018-02 | us | Extension | 1 | ||
| hl7.fhir.uv.extensions | R5 | StructureDefinition-cqf-systemUserType.json | System user type | deprecated | 3 | cds | 2015-05 | uv | Extension | |
| fhir.org.nz.ig.base | R4 | StructureDefinition-scope-of-practice.json | ScopeOfPractice | active | 2026-03 | us | Extension | 1 | ||
| hl7.fhir.uv.extensions | R5 | StructureDefinition-specimen-collectionPriority.json | Specimen Collection Priority | trial-use | 3 | oo | 2015-02 | uv | Extension | |
| hl7.fhir.uv.extensions | R5 | StructureDefinition-largeValue.json | Large Value | trial-use | 2 | fhir | 2013-12 | uv | Extension | |
| nhsdigital.fhir.stu3 | R3 | Extension-eRS-OperationOutcomeElementValue-1.json | Extension-eRS-OperationOutcomeElementValue-1 | draft | 2018-10 | Extension | 1 | |||
| hl7.fhir.uv.cmi | R4 | StructureDefinition-cmi-supportedCqlVersion.json | CMI Supported CQL Version | active | 2021-08 | uv | Extension | 1 | ||
| nictiz.fhir.nl.stu3.zib2017 | R3 | zib-Medication-StopType.json | HCIM Medication StopType | active | nl | Extension | 2 | |||
| hl7.fhir.uv.extensions | R5 | StructureDefinition-structuredefinition-wg.json | StructureDefinition Work Group | trial-use | 3 | fhir | 2014-01 | uv | Extension | |
| hl7.fhir.uv.extensions | R5 | StructureDefinition-diagnosticReport-workflowStatus.json | DiagnosticReport Workflow Status | draft | 1 | oo | 2015-02 | uv | Extension | |
| hl7.fhir.us.ph-library | R4 | StructureDefinition-us-ph-expansion-parameters-extension.json | US Public Health Expansion Parameters Extension | active | 2023-10 | us | Extension | 1 | ||
| ch.fhir.ig.ch-ekm | R4 | StructureDefinition-ch-ekm-ext-hiv-code.json | CH EKM Extension: HIV code | draft | 2026-03 | ch | Extension | 1 | ||
| ch.fhir.ig.ch-ekm | R4 | StructureDefinition-ch-ekm-ext-exposition-address.json | CH EKM Extension: Exposition Address | draft | 2026-03 | ch | Extension | |||
| ch.fhir.ig.ch-elm | R4 | StructureDefinition-ch-elm-ext-department.json | CH ELM Extension: Department | active | 2026-03 | ch | Extension | 1 | ||
| ch.fhir.ig.ch-elm | R4 | StructureDefinition-ch-elm-ext-hiv-code.json | CH ELM Extension: HIV code | active | 2026-03 | ch | Extension | 1 | ||
| ch.fhir.ig.ch-elm | R4 | StructureDefinition-ch-elm-ext-vct-code.json | CH ELM Extension: VCT code | retired | 2026-03 | ch | Extension | 1 | ||
| ch.fhir.ig.ch-epr-fhir | R4 | StructureDefinition-ch-mhd-home-community-id.json | CH MHD Extension to provide the homeCommunityId | active | 2026-01 | ch | Extension | |||
| hl7.fhir.cz.hie | R4 | StructureDefinition-cz-mhd-home-community-id.json | Z MHD Extension to provide the homeCommunityId | draft | 2026-04 | cz | Extension | 1 | ||
| hl7.fhir.uv.extensions | R5 | StructureDefinition-organization-preferredContact.json | Organization Preferred Contact | deprecated | 3 | pa | 2015-02 | uv | Extension | |
| hl7.fhir.us.ph-library | R4 | StructureDefinition-us-ph-data-encrypted-extension.json | US Public Health Data Encrypted Extension | active | 2023-10 | us | Extension | 2 | ||
| hl7.fhir.us.ph-library | R4 | StructureDefinition-us-ph-fhirquerypattern-extension.json | US Public Health FHIR Query Pattern Extension | active | 2023-10 | us | Extension | |||
| hl7.fhir.us.mdi | R4 | StructureDefinition-Extension-death-certificate-status.json | Death Certificate Status | trial-use | 3 | pher | 2025-07 | us | Extension | 1 |
| hl7.fhir.us.mdi | R4 | StructureDefinition-Extension-cremation-clearance-status.json | Cremation Clearance Authorization Status | trial-use | 3 | pher | 2025-07 | us | Extension | 1 |
| hl7.fhir.us.mdi | R4 | StructureDefinition-Extension-cremation-clearance-signature.json | Cremation Clearance Signature Status | trial-use | 3 | pher | 2025-07 | us | Extension | 1 |
| hl7.fhir.us.mdi | R4 | StructureDefinition-Extension-cremation-clearance-coroner.json | Cremation Clearance Coroner Status | trial-use | 3 | pher | 2025-07 | us | Extension | 1 |
| hl7.fhir.us.mdi | R4 | StructureDefinition-Extension-me-certification-affirmation.json | Medical Examiner Certification Affirmation | trial-use | 3 | pher | 2025-07 | us | Extension | 1 |
| fhir.r4.ukcore.stu3.currentbuild | R4 | Extension-UKCore-MedicationTradeFamily.json | Extension UK Core Medication Trade Family | active | 2022-12 | us | Extension | 1 | ||
| fhir.r4.ukcore.stu3.currentbuild | R4 | Extension-UKCore-PharmacistVerifiedIndicator.json | Extension UK Core Pharmacist Verified Indicator | active | 2021-09 | us | Extension | 1 | ||
| careconnect.stu3.03.00.00 | R3 | Extension-CareConnect-MedicationFlagAssociation-1.json | Extension-CareConnect-MedicationFlagAssociation-1 | draft | 2017-07 | Extension | 1 | |||
| careconnect.stu3.03.00.00 | R3 | Extension-CareConnect-Recorder-1.json | Extension-CareConnect-Recorder-1 | draft | 2017-07 | Extension | 3 | |||
| hl7.fhir.us.ph-library | R4 | StructureDefinition-us-ph-initiation-reason-extension.json | US Public Health Initiation Reason Extension | active | 2023-10 | us | Extension | 1 | ||
| hl7.fhir.us.ph-library | R4 | StructureDefinition-us-ph-message-processing-category-extension.json | US Public Health Message Processing Category Extension | active | 2023-10 | us | Extension | 1 | ||
| hl7.fhir.us.ph-library | R4 | StructureDefinition-us-ph-receiver-address-extension.json | US Public Health Receiver Address Extension | active | 2023-10 | us | Extension | 1 | ||
| hl7.fhir.us.ph-library | R4 | StructureDefinition-us-ph-receiver-jwks-url-extension.json | US Public Health Receiver JWKS Url Extension | active | 2023-10 | us | Extension | 1 | ||
| hl7.fhir.us.ph-library | R4 | StructureDefinition-us-ph-named-eventtype-extension.json | US Public Health Named Event Type Extension | active | 2023-10 | us | Extension | 3 | ||
| hl7.fhir.us.bfdr | R4 | StructureDefinition-Extension-encounter-maternity-reference.json | Encounter Maternity Reference | draft | pher | 2025-08 | us | Extension | 2 | |
| hl7.fhir.us.ph-library | R4 | StructureDefinition-us-ph-alternative-expression-extension.json | US Public Health Alternative Expression Extension | active | 2023-10 | us | Extension | |||
| hl7.fhir.us.ecr | R4 | StructureDefinition-eicr-trigger-code-flag-extension.json | eICR Trigger Code Flag Extension | trial-use | 3 | pher | 2025-12 | us | Extension | 2 |
| hl7.fhir.us.ph-library | R4 | StructureDefinition-us-ph-codesystem-property-required-binding-extension.json | US Public Health CodeSystem Property Required Binding Extension | active | 2023-10 | us | Extension | 1 | ||
| hl7.fhir.us.ph-library | R4 | StructureDefinition-us-ph-determination-of-reportability-rule-extension.json | US Public Health Determination of Reportability Rule Extension | active | 2023-10 | us | Extension | 1 | ||
| hl7.fhir.us.ecr.r4b | R4B | StructureDefinition-us-ph-determination-of-reportability-rule-extension.json | US Public Health Determination of Reportability Rule Extension | active | pher | 2024-10 | us | Extension | ||
| hl7.fhir.us.ph-library | R4 | StructureDefinition-us-ph-therapeutic-medication-response-extension.json | US Public Health Therapeutic Medication Response Extension | active | 2023-10 | us | Extension | 1 | ||
| hl7.fhir.us.core | R4 | StructureDefinition-us-core-tribal-affiliation.json | US Core Tribal Affiliation Extension | trial-use | 3 | cgp | 2023-10 | us | Extension | 3 |
| hl7.fhir.us.ph-library | R4 | StructureDefinition-us-ph-data-encryption-algorithm-extension.json | US Public Health Data Encryption Algorithm Extension | draft | 2019-09 | us | Extension | 1 | ||
| hl7.fhir.us.central-cancer-registry-reporting.r4 | R4 | StructureDefinition-us-ph-tribal-affiliation-extension.json | US Public Health Tribal Affiliation Extension | active | pher | 2024-05 | us | Extension | 1 | |
| hl7.fhir.us.ecr.r4b | R4B | StructureDefinition-us-ph-tribal-affiliation-extension.json | US Public Health Tribal Affiliation Extension | active | pher | 2024-10 | us | Extension | 1 | |
| hl7.fhir.us.ph-library | R4 | StructureDefinition-us-ph-tribal-affiliation-extension.json | US Public Health Tribal Affiliation Extension | active | 2023-10 | us | Extension | 1 | ||
| hl7.fhir.us.ecr | R4 | StructureDefinition-rr-external-resource-extension.json | RR External Resource Extension | trial-use | 3 | pher | 2025-12 | us | Extension | 2 |
| hl7.fhir.us.ph-library | R4 | StructureDefinition-us-ph-usagewarning-extension.json | US Public Health Usage Warning Extension | draft | 2023-10 | us | Extension | 1 | ||
| hl7.fhir.us.ph-library | R4 | StructureDefinition-us-ph-information-recipient-extension.json | US Public Health Information Recipient Extension | active | 2023-10 | us | Extension | 1 | ||
| hl7.fhir.us.ecr.r4b | R4B | StructureDefinition-us-ph-therapeutic-medication-response-extension.json | US Public Health Therapeutic Medication Response Extension | active | pher | 2021-08 | us | Extension | 1 | |
| hl7.fhir.us.ecr | R4 | StructureDefinition-eicr-initiation-type-extension.json | eICR Initiation Type Extension | trial-use | 3 | pher | 2025-12 | us | Extension | 2 |
| hl7.fhir.us.medmorph | R4 | StructureDefinition-us-ph-report-initiation-type.json | US Initiation Type Extension | active | 2023-06 | us | Extension | 1 | ||
| hl7.fhir.us.ph-library | R4 | StructureDefinition-us-ph-date-determined-extension.json | US Public Health Date Determined Extension | active | 2023-10 | us | Extension | 1 | ||
| hl7.fhir.us.ph-library | R4 | StructureDefinition-us-ph-date-recorded-extension.json | US Public Health Date Recorded Extension | active | 2023-10 | us | Extension | 1 | ||
| hl7.fhir.us.ecr | R4 | StructureDefinition-rr-eicr-receipt-time-extension.json | eICR Receipt Time Extension | trial-use | 3 | pher | 2025-12 | us | Extension | 1 |
| hl7.fhir.us.ecr.r4b | R4B | StructureDefinition-us-ph-determination-of-reportability-extension.json | US Public Health Determination of Reportability Extension | active | pher | 2024-10 | us | Extension | ||
| hl7.fhir.us.ph-library | R4 | StructureDefinition-us-ph-determination-of-reportability-extension.json | US Public Health Determination of Reportability Extension | active | 2023-10 | us | Extension | 1 | ||
| hl7.fhir.us.ecr | R4 | StructureDefinition-rr-eicr-processing-status-extension.json | eICR Processing Status Extension | trial-use | 3 | pher | 2025-12 | us | Extension | 1 |
| hl7.fhir.us.ph-library | R4 | StructureDefinition-us-ph-trust-service-endpoint-extension.json | US Public Health Trust Service Endpoint Extension | active | 2023-10 | us | Extension | |||
| hl7.fhir.us.ph-library | R4 | StructureDefinition-us-ph-async-indicator-extension.json | US Public Health Async Indicator Extension | active | 2023-10 | us | Extension | 1 | ||
| hl7.fhir.us.ph-library | R4 | StructureDefinition-us-ph-expected-response-time-extension.json | US Public Health Expected Response Time Extension | active | 2023-10 | us | Extension | 1 | ||
| hl7.fhir.us.ecr | R4 | StructureDefinition-rr-priority-extension.json | Reportability Response Priority Extension | trial-use | 3 | pher | 2025-12 | us | Extension | 2 |
| hl7.fhir.us.ph-library | R4 | StructureDefinition-us-ph-determination-of-reportability-reason-extension.json | US Public Health Determination of Reportability Reason Extension | active | 2023-10 | us | Extension | 1 | ||
| hl7.fhir.us.ecr.r4b | R4B | StructureDefinition-us-ph-determination-of-reportability-reason-extension.json | US Public Health Determination of Reportability Reason Extension | active | pher | 2024-10 | us | Extension | ||
| hl7.fhir.us.vr-common-library | R4 | StructureDefinition-Extension-reported-parent-age-at-delivery-vr.json | Reported Parent Age At Delivery Vital Records | active | pher | 2025-05 | us | Extension | 1 | |
| hl7.fhir.us.ph-library | R4 | StructureDefinition-us-ph-address-extension.json | US Public Health Address Extension | active | 2023-10 | us | Extension | 2 | ||
| hl7.fhir.us.ecr.r4b | R4B | StructureDefinition-us-ph-address-extension.json | US Public Health Address Extension | active | pher | 2024-10 | us | Extension | 2 | |
| hl7.fhir.us.ph-library | R4 | StructureDefinition-us-ph-report-initiation-type-extension.json | US Public Health Initiation Type Extension | active | 2023-10 | us | Extension | |||
| hl7.at.fhir.tc.wg.scheduling.r5 | R5 | StructureDefinition-at-scheduling-ext-cancellationPolicy.json | The policy for a cancellation | draft | 2026-03 | Extension | 3 | |||
| nhsdigital.fhir.stu3 | R3 | Extension-CareConnect-GPC-ParentPresent-1.json | Extension-CareConnect-GPC-ParentPresent-1 | draft | 2017-07 | Extension | ||||
| careconnect.stu3.03.00.00 | R3 | Extension-CareConnect-ParentPresent-1.json | Extension-CareConnect-ParentPresent-1 | draft | 2018-11 | Extension | 4 | |||
| nhsdigital.fhir.stu3 | R3 | Extension-GPConnect-AppointmentCancellationReason-1.json | Extension-GPConnect-AppointmentCancellationReason-1 | active | 2017-10 | Extension | 2 | |||
| careconnect.stu3.03.00.00 | R3 | Extension-CareConnect-AppointmentCancellationReason-1.json | Extension-CareConnect-AppointmentCancellationReason-1 | draft | 2019-12 | Extension | 1 | |||
| nhsdigital.fhir.stu3 | R3 | Extension-coding-sctdescid.json | Extension-coding-sctdescid | active | 2020-10 | Extension | 9 | |||
| careconnect.stu3.03.00.00 | R3 | Extension-coding-sctdescid.json | Extension-coding-sctdescid | draft | 2020-10 | Extension | 120 | |||
| careconnect.stu3.03.00.00 | R3 | Extension-CareConnect-FastingStatus-1.json | Extension-CareConnect-FastingStatus-1 | draft | 2017-07 | Extension | 2 | |||
| nhsdigital.fhir.stu3 | R3 | Extension-CareConnect-GPC-AllergyCertainty-1.json | Extension-CareConnect-GPC-AllergyCertainty-1 | draft | 2017-07 | Extension | ||||
| careconnect.stu3.03.00.00 | R3 | Extension-CareConnect-AllergyCertainty-1.json | Extension-CareConnect-AllergyCertainty-1 | draft | 2017-07 | Extension | ||||
| nhsdigital.fhir.stu3 | R3 | Extension-CareConnect-GPC-AllergySeverity-1.json | Extension-CareConnect-GPC-AllergySeverity-1 | draft | 2017-07 | Extension | ||||
| careconnect.stu3.03.00.00 | R3 | Extension-CareConnect-AllergySeverity-1.json | Extension-CareConnect-AllergySeverity-1 | draft | 2017-07 | Extension | ||||
| nhsdigital.fhir.stu3 | R3 | Extension-CareConnect-GPC-Evidence-1.json | Extension-CareConnect-GPC-Evidence-1 | active | 2017-07 | Extension | 1 | |||
| careconnect.stu3.03.00.00 | R3 | Extension-CareConnect-Evidence-1.json | Extension-CareConnect-Evidence-1 | draft | 2018-11 | Extension | 4 | |||
| nhsdigital.fhir.stu3 | R3 | Extension-CareConnect-GPC-ProbabilityOfRecurrence-1.json | Extension-CareConnect-GPC-ProbabilityOfRecurrence-1 | draft | 2017-07 | Extension | ||||
| careconnect.stu3.03.00.00 | R3 | Extension-CareConnect-ProbabilityOfRecurrence-1.json | Extension-CareConnect-ProbabilityOfRecurrence-1 | draft | 2017-07 | Extension | ||||
| careconnect.stu3.03.00.00 | R3 | Extension-CareConnect-DateRecorded-1.json | Extension-CareConnect-DateRecorded-1 | draft | 2018-11 | Extension | 24 | |||
| nhsdigital.fhir.stu3 | R3 | Extension-CareConnect-GPC-DateRecorded-1.json | Extension-CareConnect-GPC-DateRecorded-1 | draft | 2017-07 | Extension | ||||
| nhsdigital.fhir.stu3 | R3 | Extension-CareConnect-GPC-MedicationQuantityText-1.json | Extension-CareConnect-GPC-MedicationQuantityText-1 | active | 2017-07 | Extension | 1 | |||
| careconnect.stu3.03.00.00 | R3 | Extension-CareConnect-MedicationQuantityText-1.json | Extension-CareConnect-MedicationQuantityText-1 | draft | 2018-11 | Extension | 4 | |||
| hl7.fhir.uv.deqm | R4 | StructureDefinition-deqm-submitDataUpdateType.json | DEQM Submit Data Update Type Extension | trial-use | 4 | cqi | 2026-04 | uv | Extension | 1 |
| hl7.fhir.us.davinci-deqm | R4 | StructureDefinition-extension-submitDataUpdateType.json | DEQM Submit Data Update Type Extension | trial-use | 4 | cqi | 2025-05 | us | Extension | 1 |
| hl7-france-fhir.administrative-2022 | R4 | fr-service-type-duration-R4.StructureDefinition.json | FrServiceTypeDuration | active | 2019-07 | Extension | 3 | |||
| hl7.fhir.uv.extensions | R5 | StructureDefinition-elementdefinition-maxValueSet.json | Max value set | deprecated | 3 | fhir | 2015-02 | uv | Extension | |
| hl7.fhir.uv.extensions | R5 | StructureDefinition-workflow-generatedFrom.json | Generated from | trial-use | 2 | fhir | 2017-12 | uv | Extension | |
| hl7.fhir.uv.extensions | R5 | StructureDefinition-servicerequest-specimenSuggestion.json | ServiceRequest Specimen Suggestion | trial-use | 1 | oo | 2025-07 | uv | Extension | |
| test.no.basis | R4 | no-basis-propertyinformation.structuredefinition-extension.json | no-basis-propertyinformation | active | 2018-10 | no | Extension | 1 | ||
| test.no.basis | R4 | no-basis-partof.StructureDefinition-extension.json | no-basis-partof | active | 2023-10 | no | Extension | 1 | ||
| hl7.fhir.uv.extensions | R5 | StructureDefinition-iso21090-ADXP-additionalLocator.json | ADXP Additional Locator | trial-use | 3 | fhir | 2012-06 | uv | Extension | |
| fhir.r4.ukcore.stu3.currentbuild | R4 | Extension-UKCore-AddressKey.json | Extension UK Core Address Key | active | 2023-12 | us | Extension | 1 | ||
| hl7.fhir.uv.ebm | R6 | StructureDefinition-relevantForAutomatedMatching.json | RelevantForAutomatedMatching | trial-use | 1 | cds | 2026-03 | uv | Extension | 1 |
| hl7.fhir.uv.extensions | R5 | StructureDefinition-condition-related.json | Condition Related | trial-use | 3 | pc | 2015-02 | uv | Extension | |
| hl7.fhir.cz.img | R4 | StructureDefinition-CrossVersionMediaViewExtension.json | Media.view extension | draft | 2026-01 | cz | Extension | 1 | ||
| hl7.fhir.uv.xver-r3.r4b.r4 | R4 | StructureDefinition-ext-R3-Account.active.json | Cross-version Extension for R3.Account.active for use in FHIR R4B | trial-use | 0 | fhir | 2025-09 | uv | Extension | 4 |
| hl7.fhir.uv.xver-r3.r4b.r4 | R4 | StructureDefinition-ext-R3-Account.balance.json | Cross-version Extension for R3.Account.balance for use in FHIR R4B | trial-use | 0 | fhir | 2025-09 | uv | Extension | 4 |
| hl7.fhir.uv.xver-r5.r4.r4 | R4 | StructureDefinition-ext-R5-Account.balance.json | Cross-version Extension for R5.Account.balance for use in FHIR R4 | trial-use | 0 | fhir | 2025-09 | uv | Extension | 4 |
| hl7.fhir.uv.xver-r5.r4.r4 | R4 | StructureDefinition-ext-R5-Account.calculatedAt.json | Cross-version Extension for R5.Account.calculatedAt for use in FHIR R4 | trial-use | 0 | fhir | 2025-09 | uv | Extension | 4 |
| hl7.fhir.uv.xver-r5.r4.r4 | R4 | StructureDefinition-ext-R5-Account.currency.json | Cross-version Extension for R5.Account.currency for use in FHIR R4 | trial-use | 0 | fhir | 2025-09 | uv | Extension | 4 |
| hl7.fhir.uv.xver-r5.r4.r4 | R4 | StructureDefinition-ext-R5-Account.diagnosis.json | Cross-version Extension for R5.Account.diagnosis for use in FHIR R4 | trial-use | 0 | fhir | 2025-09 | uv | Extension | 4 |
| hl7.fhir.uv.xver-r5.r4.r4 | R4 | StructureDefinition-ext-R5-Account.procedure.json | Cross-version Extension for R5.Account.procedure for use in FHIR R4 | trial-use | 0 | fhir | 2025-09 | uv | Extension | 4 |
| hl7.fhir.uv.xver-r5.r4.r4 | R4 | StructureDefinition-ext-R5-Account.relatedAccount.json | Cross-version Extension for R5.Account.relatedAccount for use in FHIR R4 | trial-use | 0 | fhir | 2025-09 | uv | Extension | 4 |
| hl7.fhir.uv.xver-r5.r4.r4 | R4 | StructureDefinition-ext-R5-ActivityDefinition.asNeeded.json | Cross-version Extension for R5.ActivityDefinition.asNeeded[x] for use in FHIR R4 | trial-use | 0 | fhir | 2025-09 | uv | Extension | 4 |
| hl7.fhir.uv.xver-r5.r4.r4 | R4 | StructureDefinition-ext-R5-ActivityDefinition.copyrightLabel.json | Cross-version Extension for R5.ActivityDefinition.copyrightLabel for use in FHIR R4 | trial-use | 0 | fhir | 2025-09 | uv | Extension | |
| hl7.fhir.uv.xver-r5.r4.r4 | R4 | StructureDefinition-ext-R5-ActivityDefinition.dosage.json | Cross-version Extension for R5.ActivityDefinition.dosage for use in FHIR R4 | trial-use | 0 | fhir | 2025-09 | uv | Extension | |
| hl7.fhir.uv.xver-r3.r4b.r4 | R4 | StructureDefinition-ext-R3-ActivityDefinition.dy.description.json | Cross-version Extension for R3.ActivityDefinition.dynamicValue.description for use in FHIR R4B | trial-use | 0 | fhir | 2025-09 | uv | Extension | 4 |
| hl7.fhir.uv.xver-r3.r4b.r4 | R4 | StructureDefinition-ext-R3-ActivityDefinition.dy.expression.json | Cross-version Extension for R3.ActivityDefinition.dynamicValue.expression for use in FHIR R4B | trial-use | 0 | fhir | 2025-09 | uv | Extension | 4 |
| hl7.fhir.uv.xver-r3.r4b.r4 | R4 | StructureDefinition-ext-R3-ActivityDefinition.dy.language.json | Cross-version Extension for R3.ActivityDefinition.dynamicValue.language for use in FHIR R4B | trial-use | 0 | fhir | 2025-09 | uv | Extension | 4 |
| hl7.fhir.uv.xver-r5.r4.r4 | R4 | StructureDefinition-ext-R5-ActivityDefinition.kind.json | Cross-version Extension for R5.ActivityDefinition.kind for use in FHIR R4 | trial-use | 0 | fhir | 2025-09 | uv | Extension | 3 |
| hl7.fhir.uv.xver-r3.r4b.r4 | R4 | StructureDefinition-ext-R3-ActivityDefinition.library.json | Cross-version Extension for R3.ActivityDefinition.library for use in FHIR R4B | trial-use | 0 | fhir | 2025-09 | uv | Extension | 4 |
| hl7.fhir.uv.xver-r5.r4.r4 | R4 | StructureDefinition-ext-R5-ActivityDefinition.location.json | Cross-version Extension for R5.ActivityDefinition.location for use in FHIR R4 | trial-use | 0 | fhir | 2025-09 | uv | Extension | 4 |
| hl7.fhir.uv.xver-r5.r4.r4 | R4 | StructureDefinition-ext-R5-ActivityDefinition.observationRequirement.json | Cross-version Extension for R5.ActivityDefinition.observationRequirement for use in FHIR R4 | trial-use | 0 | fhir | 2025-09 | uv | Extension | 4 |
| hl7.fhir.uv.xver-r5.r4.r4 | R4 | StructureDefinition-ext-R5-ActivityDefinition.oRR.json | Cross-version Extension for R5.ActivityDefinition.observationResultRequirement for use in FHIR R4 | trial-use | 0 | fhir | 2025-09 | uv | Extension | 4 |
| hl7.fhir.uv.xver-r5.r4.r4 | R4 | StructureDefinition-ext-R5-ActivityDefinition.pa.function.json | Cross-version Extension for R5.ActivityDefinition.participant.function for use in FHIR R4 | trial-use | 0 | fhir | 2025-09 | uv | Extension | 4 |
| hl7.fhir.uv.xver-r5.r4.r4 | R4 | StructureDefinition-ext-R5-ActivityDefinition.pa.type.json | Cross-version Extension for R5.ActivityDefinition.participant.type for use in FHIR R4 | trial-use | 0 | fhir | 2025-09 | uv | Extension | 4 |
| hl7.fhir.uv.xver-r5.r4.r4 | R4 | StructureDefinition-ext-R5-ActivityDefinition.pa.typeCanonical.json | Cross-version Extension for R5.ActivityDefinition.participant.typeCanonical for use in FHIR R4 | trial-use | 0 | fhir | 2025-09 | uv | Extension | 4 |
| hl7.fhir.uv.xver-r5.r4.r4 | R4 | StructureDefinition-ext-R5-ActivityDefinition.pa.typeReference.json | Cross-version Extension for R5.ActivityDefinition.participant.typeReference for use in FHIR R4 | trial-use | 0 | fhir | 2025-09 | uv | Extension | 4 |
| hl7.fhir.uv.xver-r4b.r4.r4b | R4B | StructureDefinition-ext-R4B-ActivityDefinition.product.json | Cross-version Extension for R4B.ActivityDefinition.product[x] for use in FHIR R4 | trial-use | 0 | fhir | 2025-09 | uv | Extension | |
| hl7.fhir.uv.xver-r5.r4.r4 | R4 | StructureDefinition-ext-R5-ActivityDefinition.product.json | Cross-version Extension for R5.ActivityDefinition.product[x] for use in FHIR R4 | trial-use | 0 | fhir | 2025-09 | uv | Extension | |
| hl7.fhir.uv.xver-r5.r4.r4 | R4 | StructureDefinition-ext-R5-ActivityDefinition.relatedArtifact.json | Cross-version Extension for R5.ActivityDefinition.relatedArtifact for use in FHIR R4 | trial-use | 0 | fhir | 2025-09 | uv | Extension | |
| hl7.fhir.uv.xver-r5.r4.r4 | R4 | StructureDefinition-ext-R5-ActivityDefinition.specimenRequirement.json | Cross-version Extension for R5.ActivityDefinition.specimenRequirement for use in FHIR R4 | trial-use | 0 | fhir | 2025-09 | uv | Extension | 4 |
| hl7.fhir.uv.xver-r4b.r4.r4b | R4B | StructureDefinition-ext-R4B-ActivityDefinition.subject.json | Cross-version Extension for R4B.ActivityDefinition.subject[x] for use in FHIR R4 | trial-use | 0 | fhir | 2025-09 | uv | Extension | 2 |
| hl7.fhir.uv.xver-r5.r4.r4 | R4 | StructureDefinition-ext-R5-ActivityDefinition.subject.json | Cross-version Extension for R5.ActivityDefinition.subject[x] for use in FHIR R4 | trial-use | 0 | fhir | 2025-09 | uv | Extension | 3 |
| hl7.fhir.uv.xver-r3.r4b.r4 | R4 | StructureDefinition-ext-R3-ActivityDefinition.transform.json | Cross-version Extension for R3.ActivityDefinition.transform for use in FHIR R4B | trial-use | 0 | fhir | 2025-09 | uv | Extension | 4 |
| hl7.fhir.uv.xver-r5.r4.r4 | R4 | StructureDefinition-ext-R5-ActivityDefinition.versionAlgorithm.json | Cross-version Extension for R5.ActivityDefinition.versionAlgorithm[x] for use in FHIR R4 | trial-use | 0 | fhir | 2025-09 | uv | Extension | |
| hl7.fhir.uv.xver-r5.r4.r4 | R4 | StructureDefinition-ext-R5-ActorDefinition.json | Cross-version Extension for R5.ActorDefinition for use in FHIR R4 | trial-use | 0 | fhir | 2025-09 | uv | Extension | 1 |
| hl7.fhir.uv.xver-r4b.r4.r4b | R4B | StructureDefinition-ext-R4B-AdministrableProductDefinition.json | Cross-version Extension for R4B.AdministrableProductDefinition for use in FHIR R4 | trial-use | 0 | fhir | 2025-09 | uv | Extension | 1 |
| hl7.fhir.uv.xver-r5.r4.r4 | R4 | StructureDefinition-ext-R5-AdministrableProductDefinition.json | Cross-version Extension for R5.AdministrableProductDefinition for use in FHIR R4 | trial-use | 0 | fhir | 2025-09 | uv | Extension | 1 |
| hl7.fhir.uv.xver-r3.r4b.r4 | R4 | StructureDefinition-ext-R3-AdverseEvent.category.json | Cross-version Extension for R3.AdverseEvent.category for use in FHIR R4B | trial-use | 0 | fhir | 2025-09 | uv | Extension | 4 |
| hl7.fhir.uv.xver-r5.r4.r4 | R4 | StructureDefinition-ext-R5-AdverseEvent.contributingFactor.json | Cross-version Extension for R5.AdverseEvent.contributingFactor for use in FHIR R4 | trial-use | 0 | fhir | 2025-09 | uv | Extension | 4 |
| hl7.fhir.uv.xver-r3.r4b.r4 | R4 | StructureDefinition-ext-R3-AdverseEvent.description.json | Cross-version Extension for R3.AdverseEvent.description for use in FHIR R4B | trial-use | 0 | fhir | 2025-09 | uv | Extension | 4 |
| hl7.fhir.uv.xver-r5.r4.r4 | R4 | StructureDefinition-ext-R5-AdverseEvent.expectedInResearchStudy.json | Cross-version Extension for R5.AdverseEvent.expectedInResearchStudy for use in FHIR R4 | trial-use | 0 | fhir | 2025-09 | uv | Extension | 4 |
| hl7.fhir.uv.xver-r5.r4.r4 | R4 | StructureDefinition-ext-R5-AdverseEvent.identifier.json | Cross-version Extension for R5.AdverseEvent.identifier for use in FHIR R4 | trial-use | 0 | fhir | 2025-09 | uv | Extension | |
| hl7.fhir.uv.xver-r5.r4.r4 | R4 | StructureDefinition-ext-R5-AdverseEvent.mitigatingAction.json | Cross-version Extension for R5.AdverseEvent.mitigatingAction for use in FHIR R4 | trial-use | 0 | fhir | 2025-09 | uv | Extension | 4 |
| hl7.fhir.uv.xver-r5.r4.r4 | R4 | StructureDefinition-ext-R5-AdverseEvent.note.json | Cross-version Extension for R5.AdverseEvent.note for use in FHIR R4 | trial-use | 0 | fhir | 2025-09 | uv | Extension | 4 |
| hl7.fhir.uv.xver-r5.r4.r4 | R4 | StructureDefinition-ext-R5-AdverseEvent.occurrence.json | Cross-version Extension for R5.AdverseEvent.occurrence[x] for use in FHIR R4 | trial-use | 0 | fhir | 2025-09 | uv | Extension | 5 |
| hl7.fhir.uv.xver-r5.r4.r4 | R4 | StructureDefinition-ext-R5-AdverseEvent.participant.json | Cross-version Extension for R5.AdverseEvent.participant for use in FHIR R4 | trial-use | 0 | fhir | 2025-09 | uv | Extension | 4 |
| hl7.fhir.uv.xver-r5.r4.r4 | R4 | StructureDefinition-ext-R5-AdverseEvent.preventiveAction.json | Cross-version Extension for R5.AdverseEvent.preventiveAction for use in FHIR R4 | trial-use | 0 | fhir | 2025-09 | uv | Extension | 4 |
| hl7.fhir.uv.xver-r5.r4.r4 | R4 | StructureDefinition-ext-R5-AdverseEvent.recorder.json | Cross-version Extension for R5.AdverseEvent.recorder for use in FHIR R4 | trial-use | 0 | fhir | 2025-09 | uv | Extension | |
| hl7.fhir.uv.xver-r5.r4.r4 | R4 | StructureDefinition-ext-R5-AdverseEvent.resultingEffect.json | Cross-version Extension for R5.AdverseEvent.resultingEffect for use in FHIR R4 | trial-use | 0 | fhir | 2025-09 | uv | Extension | |
| hl7.fhir.uv.xver-r5.r4.r4 | R4 | StructureDefinition-ext-R5-AdverseEvent.status.json | Cross-version Extension for R5.AdverseEvent.status for use in FHIR R4 | trial-use | 0 | fhir | 2025-09 | uv | Extension | 4 |
| hl7.fhir.uv.xver-r3.r4b.r4 | R4 | StructureDefinition-ext-R3-AdverseEvent.subject.json | Cross-version Extension for R3.AdverseEvent.subject for use in FHIR R4B | trial-use | 0 | fhir | 2025-09 | uv | Extension | |
| hl7.fhir.uv.xver-r5.r4.r4 | R4 | StructureDefinition-ext-R5-AdverseEvent.subject.json | Cross-version Extension for R5.AdverseEvent.subject for use in FHIR R4 | trial-use | 0 | fhir | 2025-09 | uv | Extension | |
| hl7.fhir.uv.xver-r5.r4.r4 | R4 | StructureDefinition-ext-R5-AdverseEvent.supportingInfo.json | Cross-version Extension for R5.AdverseEvent.supportingInfo for use in FHIR R4 | trial-use | 0 | fhir | 2025-09 | uv | Extension | 4 |
| hl7.fhir.uv.xver-r3.r4b.r4 | R4 | StructureDefinition-ext-R3-AdverseEvent.su.causality.json | Cross-version Extension for R3.AdverseEvent.suspectEntity.causality for use in FHIR R4B | trial-use | 0 | fhir | 2025-09 | uv | Extension | 4 |
| hl7.fhir.uv.xver-r5.r4.r4 | R4 | StructureDefinition-ext-R5-AdverseEvent.su.ca.author.json | Cross-version Extension for R5.AdverseEvent.suspectEntity.causality.author for use in FHIR R4 | trial-use | 0 | fhir | 2025-09 | uv | Extension | |
| hl7.fhir.uv.xver-r5.r4.r4 | R4 | StructureDefinition-ext-R5-AdverseEvent.su.ca.entityRelatedness.json | Cross-version Extension for R5.AdverseEvent.suspectEntity.causality.entityRelatedness for use in FHIR R4 | trial-use | 0 | fhir | 2025-09 | uv | Extension | 4 |
| hl7.fhir.uv.xver-r3.r4b.r4 | R4 | StructureDefinition-ext-R3-AdverseEvent.su.causalityResult.json | Cross-version Extension for R3.AdverseEvent.suspectEntity.causalityResult for use in FHIR R4B | trial-use | 0 | fhir | 2025-09 | uv | Extension | 4 |
| hl7.fhir.uv.xver-r5.r4.r4 | R4 | StructureDefinition-ext-R5-AdverseEvent.su.instance.json | Cross-version Extension for R5.AdverseEvent.suspectEntity.instance[x] for use in FHIR R4 | trial-use | 0 | fhir | 2025-09 | uv | Extension | 4 |
| hl7.fhir.uv.xver-r3.r4b.r4 | R4 | StructureDefinition-ext-R3-AdverseEvent.type.json | Cross-version Extension for R3.AdverseEvent.type for use in FHIR R4B | trial-use | 0 | fhir | 2025-09 | uv | Extension | |
| hl7.fhir.uv.xver-r5.r4.r4 | R4 | StructureDefinition-ext-R5-Age.comparator.json | Cross-version Extension for R5.Age.comparator for use in FHIR R4 | trial-use | 0 | fhir | 2025-09 | uv | Extension | |
| hl7.fhir.uv.xver-r3.r4b.r4 | R4 | StructureDefinition-ext-R3-AllergyIntolerance.clinicalStatus.json | Cross-version Extension for R3.AllergyIntolerance.clinicalStatus for use in FHIR R4B | trial-use | 0 | fhir | 2025-09 | uv | Extension | |
| hl7.fhir.uv.xver-r5.r4.r4 | R4 | StructureDefinition-ext-R5-AllergyIntolerance.participant.json | Cross-version Extension for R5.AllergyIntolerance.participant for use in FHIR R4 | trial-use | 0 | fhir | 2025-09 | uv | Extension | 4 |
| hl7.fhir.uv.xver-r5.r4.r4 | R4 | StructureDefinition-ext-R5-AllergyIntolerance.re.manifestation.json | Cross-version Extension for R5.AllergyIntolerance.reaction.manifestation for use in FHIR R4 | trial-use | 0 | fhir | 2025-09 | uv | Extension | 4 |
| hl7.fhir.uv.xver-r3.r4b.r4 | R4 | StructureDefinition-ext-R3-AllergyIntolerance.verificationStatus.json | Cross-version Extension for R3.AllergyIntolerance.verificationStatus for use in FHIR R4B | trial-use | 0 | fhir | 2025-09 | uv | Extension | |
| hl7.fhir.uv.xver-r5.r4.r4 | R4 | StructureDefinition-ext-R5-AllergyIntolerance.verificationStatus.json | Cross-version Extension for R5.AllergyIntolerance.verificationStatus for use in FHIR R4 | trial-use | 0 | fhir | 2025-09 | uv | Extension | 4 |
| hl7.fhir.uv.xver-r5.r4.r4 | R4 | StructureDefinition-ext-R5-Annotation.author.json | Cross-version Extension for R5.Annotation.author[x] for use in FHIR R4 | trial-use | 0 | fhir | 2025-09 | uv | Extension | |
| hl7.fhir.uv.xver-r5.r4.r4 | R4 | StructureDefinition-ext-R5-Appointment.account.json | Cross-version Extension for R5.Appointment.account for use in FHIR R4 | trial-use | 0 | fhir | 2025-09 | uv | Extension | 4 |
| hl7.fhir.uv.xver-r5.r4.r4 | R4 | StructureDefinition-ext-R5-Appointment.basedOn.json | Cross-version Extension for R5.Appointment.basedOn for use in FHIR R4 | trial-use | 0 | fhir | 2025-09 | uv | Extension | |
| hl7.fhir.uv.xver-r5.r4.r4 | R4 | StructureDefinition-ext-R5-Appointment.cancellationDate.json | Cross-version Extension for R5.Appointment.cancellationDate for use in FHIR R4 | trial-use | 0 | fhir | 2025-09 | uv | Extension | 4 |
| hl7.fhir.uv.xver-r5.r4.r4 | R4 | StructureDefinition-ext-R5-Appointment.class.json | Cross-version Extension for R5.Appointment.class for use in FHIR R4 | trial-use | 0 | fhir | 2025-09 | uv | Extension | 5 |
| hl7.fhir.uv.xver-r3.r4b.r4 | R4 | StructureDefinition-ext-R3-Appointment.incomingReferral.json | Cross-version Extension for R3.Appointment.incomingReferral for use in FHIR R4B | trial-use | 0 | fhir | 2025-09 | uv | Extension | |
| hl7.fhir.uv.xver-r5.r4.r4 | R4 | StructureDefinition-ext-R5-Appointment.note.json | Cross-version Extension for R5.Appointment.note for use in FHIR R4 | trial-use | 0 | fhir | 2025-09 | uv | Extension | 4 |
| hl7.fhir.uv.xver-r5.r4.r4 | R4 | StructureDefinition-ext-R5-Appointment.occurrenceChanged.json | Cross-version Extension for R5.Appointment.occurrenceChanged for use in FHIR R4 | trial-use | 0 | fhir | 2025-09 | uv | Extension | 4 |
| hl7.fhir.uv.xver-r5.r4.r4 | R4 | StructureDefinition-ext-R5-Appointment.originatingAppointment.json | Cross-version Extension for R5.Appointment.originatingAppointment for use in FHIR R4 | trial-use | 0 | fhir | 2025-09 | uv | Extension | 4 |
| hl7.fhir.uv.xver-r5.r4.r4 | R4 | StructureDefinition-ext-R5-Appointment.pa.actor.json | Cross-version Extension for R5.Appointment.participant.actor for use in FHIR R4 | trial-use | 0 | fhir | 2025-09 | uv | Extension | |
| hl7.fhir.uv.xver-r2.r4.r4b | R4B | StructureDefinition-ext-R2-Appointment.pa.status.json | Cross-version Extension for R2.Appointment.participant.status for use in FHIR R4 | trial-use | 0 | fhir | 2025-09 | uv | Extension | |
| hl7.fhir.uv.xver-r5.r4.r4 | R4 | StructureDefinition-ext-R5-Appointment.patientInstruction.json | Cross-version Extension for R5.Appointment.patientInstruction for use in FHIR R4 | trial-use | 0 | fhir | 2025-09 | uv | Extension | 4 |
| hl7.fhir.uv.xver-r5.r4.r4 | R4 | StructureDefinition-ext-R5-Appointment.previousAppointment.json | Cross-version Extension for R5.Appointment.previousAppointment for use in FHIR R4 | trial-use | 0 | fhir | 2025-09 | uv | Extension | 4 |
| hl7.fhir.uv.xver-r5.r4.r4 | R4 | StructureDefinition-ext-R5-Appointment.priority.json | Cross-version Extension for R5.Appointment.priority for use in FHIR R4 | trial-use | 0 | fhir | 2025-09 | uv | Extension | 4 |
| hl7.fhir.uv.xver-r5.r4.r4 | R4 | StructureDefinition-ext-R5-Appointment.reason.json | Cross-version Extension for R5.Appointment.reason for use in FHIR R4 | trial-use | 0 | fhir | 2025-09 | uv | Extension | 4 |
| hl7.fhir.uv.xver-r5.r4.r4 | R4 | StructureDefinition-ext-R5-Appointment.recurrenceId.json | Cross-version Extension for R5.Appointment.recurrenceId for use in FHIR R4 | trial-use | 0 | fhir | 2025-09 | uv | Extension | 4 |
| hl7.fhir.uv.xver-r5.r4.r4 | R4 | StructureDefinition-ext-R5-Appointment.recurrenceTemplate.json | Cross-version Extension for R5.Appointment.recurrenceTemplate for use in FHIR R4 | trial-use | 0 | fhir | 2025-09 | uv | Extension | 4 |
| hl7.fhir.uv.xver-r5.r4.r4 | R4 | StructureDefinition-ext-R5-Appointment.replaces.json | Cross-version Extension for R5.Appointment.replaces for use in FHIR R4 | trial-use | 0 | fhir | 2025-09 | uv | Extension | 6 |
| hl7.fhir.uv.xver-r5.r4.r4 | R4 | StructureDefinition-ext-R5-Appointment.serviceType.json | Cross-version Extension for R5.Appointment.serviceType for use in FHIR R4 | trial-use | 0 | fhir | 2025-09 | uv | Extension | 4 |
| hl7.fhir.uv.xver-r5.r4.r4 | R4 | StructureDefinition-ext-R5-Appointment.subject.json | Cross-version Extension for R5.Appointment.subject for use in FHIR R4 | trial-use | 0 | fhir | 2025-09 | uv | Extension | 4 |
| hl7.fhir.uv.xver-r5.r4.r4 | R4 | StructureDefinition-ext-R5-Appointment.virtualService.json | Cross-version Extension for R5.Appointment.virtualService for use in FHIR R4 | trial-use | 0 | fhir | 2025-09 | uv | Extension | 4 |
| hl7.fhir.uv.xver-r5.r4.r4 | R4 | StructureDefinition-ext-R5-AppointmentResponse.actor.json | Cross-version Extension for R5.AppointmentResponse.actor for use in FHIR R4 | trial-use | 0 | fhir | 2025-09 | uv | Extension | |
| hl7.fhir.uv.xver-r5.r4.r4 | R4 | StructureDefinition-ext-R5-AppointmentResponse.occurrenceDate.json | Cross-version Extension for R5.AppointmentResponse.occurrenceDate for use in FHIR R4 | trial-use | 0 | fhir | 2025-09 | uv | Extension | 4 |
| hl7.fhir.uv.xver-r5.r4.r4 | R4 | StructureDefinition-ext-R5-AppointmentResponse.participantStatus.json | Cross-version Extension for R5.AppointmentResponse.participantStatus for use in FHIR R4 | trial-use | 0 | fhir | 2025-09 | uv | Extension | 4 |
| hl7.fhir.uv.xver-r5.r4.r4 | R4 | StructureDefinition-ext-R5-AppointmentResponse.proposedNewTime.json | Cross-version Extension for R5.AppointmentResponse.proposedNewTime for use in FHIR R4 | trial-use | 0 | fhir | 2025-09 | uv | Extension | 4 |
| hl7.fhir.uv.xver-r5.r4.r4 | R4 | StructureDefinition-ext-R5-AppointmentResponse.recurrenceId.json | Cross-version Extension for R5.AppointmentResponse.recurrenceId for use in FHIR R4 | trial-use | 0 | fhir | 2025-09 | uv | Extension | 4 |
| hl7.fhir.uv.xver-r5.r4.r4 | R4 | StructureDefinition-ext-R5-AppointmentResponse.recurring.json | Cross-version Extension for R5.AppointmentResponse.recurring for use in FHIR R4 | trial-use | 0 | fhir | 2025-09 | uv | Extension | 4 |
| hl7.fhir.uv.xver-r5.r4.r4 | R4 | StructureDefinition-ext-R5-ArtifactAssessment.json | Cross-version Extension for R5.ArtifactAssessment for use in FHIR R4 | trial-use | 0 | fhir | 2025-09 | uv | Extension | 1 |
| hl7.fhir.uv.xver-r5.r4.r4 | R4 | StructureDefinition-ext-R5-Attachment.duration.json | Cross-version Extension for R5.Attachment.duration for use in FHIR R4 | trial-use | 0 | fhir | 2025-09 | uv | Extension | |
| hl7.fhir.uv.xver-r5.r4.r4 | R4 | StructureDefinition-ext-R5-Attachment.frames.json | Cross-version Extension for R5.Attachment.frames for use in FHIR R4 | trial-use | 0 | fhir | 2025-09 | uv | Extension | |
| hl7.fhir.uv.xver-r5.r4.r4 | R4 | StructureDefinition-ext-R5-Attachment.height.json | Cross-version Extension for R5.Attachment.height for use in FHIR R4 | trial-use | 0 | fhir | 2025-09 | uv | Extension | |
| hl7.fhir.uv.xver-r5.r4.r4 | R4 | StructureDefinition-ext-R5-Attachment.pages.json | Cross-version Extension for R5.Attachment.pages for use in FHIR R4 | trial-use | 0 | fhir | 2025-09 | uv | Extension | |
| hl7.fhir.uv.xver-r5.r4.r4 | R4 | StructureDefinition-ext-R5-Attachment.size.json | Cross-version Extension for R5.Attachment.size for use in FHIR R4 | trial-use | 0 | fhir | 2025-09 | uv | Extension | |
| hl7.fhir.uv.xver-r5.r4.r4 | R4 | StructureDefinition-ext-R5-Attachment.width.json | Cross-version Extension for R5.Attachment.width for use in FHIR R4 | trial-use | 0 | fhir | 2025-09 | uv | Extension |
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