description: 'A variation that increases or decreases the copy number of a given region ([SO:0001019](http://www.sequenceontology.org/browser/current_svn/term/SO:0001019)). Values: amplification/deletion/LOH.'
package_name: rs/hl7.fhir.core
derivation: constraint
name: Copy number variation
type: Extension
elements:
  extension:
    index: 0
    slicing:
      slices:
        extension:
          match: {}
          schema: {index: 0}
          max: 0
  url:
    type: uri
    pattern: {type: uri, value: 'http://hl7.org/fhir/StructureDefinition/observation-geneticsCopyNumberEvent'}
    index: 1
  value:
    choices: [valueCodeableConcept]
    index: 3
  valueCodeableConcept: {type: CodeableConcept, choiceOf: value, index: 4}
package_version: 1.8.0
extensions:
  extension: {url: null, max: 0, index: 0}
class: extension
kind: complex-type
url: http://hl7.org/fhir/StructureDefinition/observation-geneticsCopyNumberEvent
base: http://hl7.org/fhir/StructureDefinition/Extension
version: null
required: [value, valueCodeableConcept]