description: This profile sets minimum expectations for an Observation resource to record, search, and fetch observation of clinical assertions that there are no items of interest, e.g. no current medications, for a patient. It is based on the core [Observation](http://hl7.org/fhir/R4/observation.html) resource and identifies the *additional* mandatory core elements, extensions, vocabularies and value sets that **SHALL** be present in the Observation when conforming to this profile. It provides the floor for standards development for specific uses cases in an Australian context.
package_name: hl7.fhir.au.core
derivation: constraint
name: AUCoreAssertionNoRelevantFinding
type: Observation
elements:
  status:
    pattern: {type: Code, value: final}
    mustSupport: true
    index: 0
  code:
    mustSupport: true
    pattern:
      type: CodeableConcept
      value:
        coding:
        - {code: ASSERTION, system: 'http://terminology.hl7.org/CodeSystem/v3-ActCode'}
    index: 1
  subject:
    type: Reference
    mustSupport: true
    refers: ['http://hl7.org.au/fhir/core/StructureDefinition/au-core-patient']
    index: 2
  effective:
    constraint:
      au-core-obs-01: {human: Date shall be at least to day, source: 'http://hl7.org.au/fhir/core/StructureDefinition/au-core-norelevantfinding', severity: error, expression: $this is DateTime implies $this.toString().length() >= 10}
    short: Date, and optionally time, the observation was performed
    mustSupport: true
    choices: [effectiveDateTime]
    index: 4
  effectiveDateTime:
    constraint:
      au-core-obs-01: {human: Date shall be at least to day, source: 'http://hl7.org.au/fhir/core/StructureDefinition/au-core-norelevantfinding', severity: error, expression: $this is DateTime implies $this.toString().length() >= 10}
    short: Date, and optionally time, the observation was performed
    type: dateTime
    mustSupport: true
    choiceOf: effective
    index: 5
  performer:
    type: Reference
    short: Asserter of the statement
    mustSupport: true
    refers: ['http://hl7.org.au/fhir/core/StructureDefinition/au-core-organization', 'http://hl7.org.au/fhir/core/StructureDefinition/au-core-patient', 'http://hl7.org.au/fhir/core/StructureDefinition/au-core-practitionerrole', 'http://hl7.org.au/fhir/core/StructureDefinition/au-core-relatedperson']
    index: 6
  value:
    mustSupport: true
    choices: [valueCodeableConcept]
    index: 8
  valueCodeableConcept: {type: CodeableConcept, mustSupport: true, choiceOf: value, index: 9}
package_version: 0.2.0-preview
class: profile
kind: resource
url: http://hl7.org.au/fhir/core/StructureDefinition/au-core-norelevantfinding
base: http://hl7.org/fhir/StructureDefinition/Observation
version: 0.2.0-preview
required: [effectiveDateTime, value, subject, valueCodeableConcept, effective]