description: Profile of Group for Evidence Based Medicine IG. The CohortDefinition Profile is used to provide a conceptual or definitional representation of a Group. In R6, membership = conceptual allows avoiding the required use of type. In R5, membership will be definitional and type value can be ignored for resource content processing. package_name: hl7.fhir.uv.ebm derivation: constraint name: CohortDefinition type: Group elements: membership: pattern: {type: Code, value: definitional} index: 0 quantity: {index: 1} member: {index: 2} package_version: 1.0.0-ballot class: profile kind: resource url: http://hl7.org/fhir/uv/ebm/StructureDefinition/cohort-definition base: http://hl7.org/fhir/uv/ebm/StructureDefinition/group-r6 version: 1.0.0-ballot