description: Profile of EvidenceVariable for Evidence Based Medicine IG. The VariableDefinition Profile uses a CodeableReference Datatype to provide a concept (e.g. coding in a code system) and/or a reference to a Group Resource for structured data to define the variable.
package_name: hl7.fhir.uv.ebm
derivation: constraint
name: VariableDefinition
type: EvidenceVariable
elements:
  extension:
    index: 0
    slicing:
      rules: open
      ordered: false
      discriminator:
      - {path: url, type: value}
      min: 1
      slices:
        definition:
          match: {url: null}
          schema: {type: Extension, url: 'http://hl7.org/fhir/uv/ebm/StructureDefinition/evidence-variable-definition', index: 1}
          min: 1
          max: 1
  characteristic: {index: 2}
  handling: {index: 3}
  category:
    extensions:
      valueReference: {url: 'http://hl7.org/fhir/uv/ebm/StructureDefinition/evidence-variable-category-value-reference', min: 0, max: 1, type: Extension, index: 5}
    elements:
      extension:
        index: 4
        slicing:
          rules: open
          ordered: false
          discriminator:
          - {path: url, type: value}
          min: null
          slices:
            valueReference:
              match: {url: null}
              schema: {type: Extension, url: 'http://hl7.org/fhir/uv/ebm/StructureDefinition/evidence-variable-category-value-reference', index: 5}
              min: 0
              max: 1
package_version: 1.0.0-ballot
extensions:
  definition: {url: 'http://hl7.org/fhir/uv/ebm/StructureDefinition/evidence-variable-definition', min: 1, max: 1, type: Extension, index: 1}
class: profile
kind: resource
url: http://hl7.org/fhir/uv/ebm/StructureDefinition/variable-definition
base: http://hl7.org/fhir/StructureDefinition/EvidenceVariable
version: 1.0.0-ballot
required: [extension, handling]