| Source Element | Usage | Target |
| ResearchStudy.id | UseElementSameName | ResearchStudy.id |
| ResearchStudy.meta | UseElementSameName | ResearchStudy.meta |
| ResearchStudy.implicitRules | UseElementSameName | ResearchStudy.implicitRules |
| ResearchStudy.language | UseElementSameName | ResearchStudy.language |
| ResearchStudy.text | UseElementSameName | ResearchStudy.text |
| ResearchStudy.contained | UseElementSameName | ResearchStudy.contained |
| ResearchStudy.extension | UseElementSameName | ResearchStudy.extension |
| ResearchStudy.modifierExtension | UseElementSameName | ResearchStudy.modifierExtension |
| ResearchStudy.url | UseExtension | http://hl7.org/fhir/5.0/StructureDefinition/extension-ResearchStudy.url |
| ResearchStudy.identifier | UseElementSameName | ResearchStudy.identifier |
| ResearchStudy.version | UseExtension | http://hl7.org/fhir/5.0/StructureDefinition/extension-ResearchStudy.version |
| ResearchStudy.name | UseExtension | http://hl7.org/fhir/5.0/StructureDefinition/extension-ResearchStudy.name |
| ResearchStudy.title | UseElementSameName | ResearchStudy.title |
| ResearchStudy.label | UseExtension | http://hl7.org/fhir/5.0/StructureDefinition/extension-ResearchStudy.label |
| ResearchStudy.label.id | UseExtensionFromAncestor | - |
| ResearchStudy.label.extension | UseExtensionFromAncestor | - |
| ResearchStudy.label.modifierExtension | UseExtensionFromAncestor | - |
| ResearchStudy.label.type | UseExtensionFromAncestor | - |
| ResearchStudy.label.value | UseExtensionFromAncestor | - |
| ResearchStudy.protocol | UseElementSameName | ResearchStudy.protocol |
| ResearchStudy.partOf | UseElementSameName | ResearchStudy.partOf |
| ResearchStudy.relatedArtifact | UseExtension | http://hl7.org/fhir/5.0/StructureDefinition/extension-ResearchStudy.relatedArtifact |
| ResearchStudy.date | UseExtension | http://hl7.org/fhir/5.0/StructureDefinition/extension-ResearchStudy.date |
| ResearchStudy.status | UseExtension | http://hl7.org/fhir/5.0/StructureDefinition/extension-ResearchStudy.status |
| ResearchStudy.primaryPurposeType | UseElementSameName | ResearchStudy.primaryPurposeType |
| ResearchStudy.phase | UseElementSameName | ResearchStudy.phase |
| ResearchStudy.studyDesign | UseExtension | http://hl7.org/fhir/5.0/StructureDefinition/extension-ResearchStudy.studyDesign |
| ResearchStudy.focus | UseExtension | http://hl7.org/fhir/5.0/StructureDefinition/extension-ResearchStudy.focus |
| ResearchStudy.condition | UseElementSameName | ResearchStudy.condition |
| ResearchStudy.keyword | UseElementSameName | ResearchStudy.keyword |
| ResearchStudy.region | UseExtension | http://hl7.org/fhir/5.0/StructureDefinition/extension-ResearchStudy.region |
| ResearchStudy.descriptionSummary | UseExtension | http://hl7.org/fhir/5.0/StructureDefinition/extension-ResearchStudy.descriptionSummary |
| ResearchStudy.description | UseElementSameName | ResearchStudy.description |
| ResearchStudy.period | UseElementSameName | ResearchStudy.period |
| ResearchStudy.site | UseElementSameName | ResearchStudy.site |
| ResearchStudy.note | UseElementSameName | ResearchStudy.note |
| ResearchStudy.classifier | UseExtension | http://hl7.org/fhir/5.0/StructureDefinition/extension-ResearchStudy.classifier |
| ResearchStudy.associatedParty | UseExtension | http://hl7.org/fhir/5.0/StructureDefinition/extension-ResearchStudy.associatedParty |
| ResearchStudy.associatedParty.id | UseExtensionFromAncestor | - |
| ResearchStudy.associatedParty.extension | UseExtensionFromAncestor | - |
| ResearchStudy.associatedParty.modifierExtension | UseExtensionFromAncestor | - |
| ResearchStudy.associatedParty.name | UseExtensionFromAncestor | - |
| ResearchStudy.associatedParty.role | UseExtensionFromAncestor | - |
| ResearchStudy.associatedParty.period | UseExtensionFromAncestor | - |
| ResearchStudy.associatedParty.classifier | UseExtensionFromAncestor | - |
| ResearchStudy.associatedParty.party | UseExtensionFromAncestor | - |
| ResearchStudy.progressStatus | UseExtension | http://hl7.org/fhir/5.0/StructureDefinition/extension-ResearchStudy.progressStatus |
| ResearchStudy.progressStatus.id | UseExtensionFromAncestor | - |
| ResearchStudy.progressStatus.extension | UseExtensionFromAncestor | - |
| ResearchStudy.progressStatus.modifierExtension | UseExtensionFromAncestor | - |
| ResearchStudy.progressStatus.state | UseExtensionFromAncestor | - |
| ResearchStudy.progressStatus.actual | UseExtensionFromAncestor | - |
| ResearchStudy.progressStatus.period | UseExtensionFromAncestor | - |
| ResearchStudy.whyStopped | UseExtension | http://hl7.org/fhir/5.0/StructureDefinition/extension-ResearchStudy.whyStopped |
| ResearchStudy.recruitment | UseExtension | http://hl7.org/fhir/5.0/StructureDefinition/extension-ResearchStudy.recruitment |
| ResearchStudy.recruitment.id | UseExtensionFromAncestor | - |
| ResearchStudy.recruitment.extension | UseExtensionFromAncestor | - |
| ResearchStudy.recruitment.modifierExtension | UseExtensionFromAncestor | - |
| ResearchStudy.recruitment.targetNumber | UseExtensionFromAncestor | - |
| ResearchStudy.recruitment.actualNumber | UseExtensionFromAncestor | - |
| ResearchStudy.recruitment.eligibility | UseExtensionFromAncestor | - |
| ResearchStudy.recruitment.actualGroup | UseExtensionFromAncestor | - |
| ResearchStudy.comparisonGroup | UseExtension | http://hl7.org/fhir/5.0/StructureDefinition/extension-ResearchStudy.comparisonGroup |
| ResearchStudy.comparisonGroup.id | UseExtensionFromAncestor | - |
| ResearchStudy.comparisonGroup.extension | UseExtensionFromAncestor | - |
| ResearchStudy.comparisonGroup.modifierExtension | UseExtensionFromAncestor | - |
| ResearchStudy.comparisonGroup.linkId | UseExtensionFromAncestor | - |
| ResearchStudy.comparisonGroup.name | UseExtensionFromAncestor | - |
| ResearchStudy.comparisonGroup.type | UseExtensionFromAncestor | - |
| ResearchStudy.comparisonGroup.description | UseExtensionFromAncestor | - |
| ResearchStudy.comparisonGroup.intendedExposure | UseExtensionFromAncestor | - |
| ResearchStudy.comparisonGroup.observedGroup | UseExtensionFromAncestor | - |
| ResearchStudy.objective | UseElementSameName | ResearchStudy.objective |
| ResearchStudy.objective.id | UseElementSameName | ResearchStudy.objective.id |
| ResearchStudy.objective.extension | UseElementSameName | ResearchStudy.objective.extension |
| ResearchStudy.objective.modifierExtension | UseElementSameName | ResearchStudy.objective.modifierExtension |
| ResearchStudy.objective.name | UseElementSameName | ResearchStudy.objective.name |
| ResearchStudy.objective.type | UseElementSameName | ResearchStudy.objective.type |
| ResearchStudy.objective.description | UseExtension | http://hl7.org/fhir/5.0/StructureDefinition/extension-ResearchStudy.objective.description |
| ResearchStudy.outcomeMeasure | UseExtension | http://hl7.org/fhir/5.0/StructureDefinition/extension-ResearchStudy.outcomeMeasure |
| ResearchStudy.outcomeMeasure.id | UseExtensionFromAncestor | - |
| ResearchStudy.outcomeMeasure.extension | UseExtensionFromAncestor | - |
| ResearchStudy.outcomeMeasure.modifierExtension | UseExtensionFromAncestor | - |
| ResearchStudy.outcomeMeasure.name | UseExtensionFromAncestor | - |
| ResearchStudy.outcomeMeasure.type | UseExtensionFromAncestor | - |
| ResearchStudy.outcomeMeasure.description | UseExtensionFromAncestor | - |
| ResearchStudy.outcomeMeasure.reference | UseExtensionFromAncestor | - |
| ResearchStudy.result | UseExtension | http://hl7.org/fhir/5.0/StructureDefinition/extension-ResearchStudy.result |