This page is part of the FHIR Specification v6.0.0-ballot1: Release 6 Ballot (1st Draft) (see Ballot Notes ). The current version is 5.0.0 .  For a full list of available versions, see the Directory of published versions  
Search parameters for the Resource MessageHeader - Search Parameters resource. Also check the Extensions registry  for search parameters 
on extensions related to this resource.
http://hl7.org/fhir/SearchParameter/MessageHeader-code2.15.15    code Parameter code:token
ok | transient-error | fatal-error
Resource MessageHeader Expression MessageHeader.response.codeProcessing Mode Normal Multiples multipleAnd: It's up to the server whether the parameter may repeat in order to specify multiple values that must all be true multipleOr: It's up to the server whether the parameter can have multiple values (separated by comma) where at least one must be true 
  http://hl7.org/fhir/SearchParameter/MessageHeader-destination2.15.16    destination Parameter destination:string
Resource MessageHeader Expression MessageHeader.destination.nameProcessing Mode Normal Multiples multipleAnd: It's up to the server whether the parameter may repeat in order to specify multiple values that must all be true multipleOr: It's up to the server whether the parameter can have multiple values (separated by comma) where at least one must be true 
  http://hl7.org/fhir/SearchParameter/MessageHeader-event2.15.17    event Parameter event:token
Code for the event this message represents or link to event definition
Resource MessageHeader Expression MessageHeader.event.ofType(Coding) | MessageHeader.event.ofType(canonical)Processing Mode Normal Multiples multipleAnd: It's up to the server whether the parameter may repeat in order to specify multiple values that must all be true multipleOr: It's up to the server whether the parameter can have multiple values (separated by comma) where at least one must be true 
  http://hl7.org/fhir/SearchParameter/MessageHeader-focus2.15.18    focus Parameter focus:reference
The actual content of the message
Resource MessageHeader Expression MessageHeader.focusProcessing Mode Normal Target Resources Account , ActivityDefinition , ActorDefinition , AdministrableProductDefinition , AdverseEvent , AllergyIntolerance , Appointment , AppointmentResponse , ArtifactAssessment , AuditEvent , Basic , Binary , BiologicallyDerivedProduct , BiologicallyDerivedProductDispense , BodyStructure , Bundle , CapabilityStatement , CarePlan , CareTeam , ChargeItem , ChargeItemDefinition , Citation , Claim , ClaimResponse , ClinicalImpression , ClinicalUseDefinition , CodeSystem , Communication , CommunicationRequest , CompartmentDefinition , Composition , ConceptMap , Condition , ConditionDefinition , Consent , Contract , Coverage , CoverageEligibilityRequest , CoverageEligibilityResponse , DetectedIssue , Device , DeviceAssociation , DeviceDefinition , DeviceDispense , DeviceMetric , DeviceRequest , DeviceUsage , DiagnosticReport , DocumentReference , Encounter , EncounterHistory , Endpoint , EnrollmentRequest , EnrollmentResponse , EpisodeOfCare , EventDefinition , Evidence , EvidenceReport , EvidenceVariable , ExampleScenario , ExplanationOfBenefit , FamilyMemberHistory , Flag , FormularyItem , GenomicStudy , Goal , GraphDefinition , Group , GuidanceResponse , HealthcareService , ImagingSelection , ImagingStudy , Immunization , ImmunizationEvaluation , ImmunizationRecommendation , ImplementationGuide , Ingredient , InsurancePlan , InventoryItem , InventoryReport , Invoice , Library , Linkage , List , Location , ManufacturedItemDefinition , Measure , MeasureReport , Medication , MedicationAdministration , MedicationDispense , MedicationKnowledge , MedicationRequest , MedicationStatement , MedicinalProductDefinition , MessageDefinition , MessageHeader , MolecularSequence , NamingSystem , NutritionIntake , NutritionOrder , NutritionProduct , Observation , ObservationDefinition , OperationDefinition , OperationOutcome , Organization , OrganizationAffiliation , PackagedProductDefinition , Parameters , Patient , PaymentNotice , PaymentReconciliation , Permission , Person , PlanDefinition , Practitioner , PractitionerRole , Procedure , Provenance , Questionnaire , QuestionnaireResponse , RegulatedAuthorization , RelatedPerson , RequestOrchestration , Requirements , ResearchStudy , ResearchSubject , RiskAssessment , Schedule , SearchParameter , ServiceRequest , Slot , Specimen , SpecimenDefinition , StructureDefinition , StructureMap , Subscription , SubscriptionStatus , SubscriptionTopic , Substance , SubstanceDefinition , SubstanceNucleicAcid , SubstancePolymer , SubstanceProtein , SubstanceReferenceInformation , SubstanceSourceMaterial , SupplyDelivery , SupplyRequest , Task , TerminologyCapabilities , TestPlan , TestReport , TestScript , Transport , ValueSet , VerificationResult , VisionPrescription Multiples multipleAnd: It's up to the server whether the parameter may repeat in order to specify multiple values that must all be true multipleOr: It's up to the server whether the parameter can have multiple values (separated by comma) where at least one must be true 
  http://hl7.org/fhir/SearchParameter/MessageHeader-receiver2.15.19    receiver Parameter receiver:reference
Intended "real-world" recipient for the data
Resource MessageHeader Expression MessageHeader.destination.receiverProcessing Mode Normal Target Resources Organization , PractitionerRole , Practitioner Multiples multipleAnd: It's up to the server whether the parameter may repeat in order to specify multiple values that must all be true multipleOr: It's up to the server whether the parameter can have multiple values (separated by comma) where at least one must be true 
  http://hl7.org/fhir/SearchParameter/MessageHeader-response-id2.15.20    response-id Parameter response-id:token
Resource MessageHeader Expression MessageHeader.response.identifierProcessing Mode Normal Multiples multipleAnd: It's up to the server whether the parameter may repeat in order to specify multiple values that must all be true multipleOr: It's up to the server whether the parameter can have multiple values (separated by comma) where at least one must be true 
  http://hl7.org/fhir/SearchParameter/MessageHeader-sender2.15.21    sender Parameter sender:reference
Real world sender of the message
Resource MessageHeader Expression MessageHeader.source.senderProcessing Mode Normal Target Resources Device , Organization , PractitionerRole , Practitioner Multiples multipleAnd: It's up to the server whether the parameter may repeat in order to specify multiple values that must all be true multipleOr: It's up to the server whether the parameter can have multiple values (separated by comma) where at least one must be true 
  http://hl7.org/fhir/SearchParameter/MessageHeader-source2.15.22    source Parameter source:string
Resource MessageHeader Expression MessageHeader.source.nameProcessing Mode Normal Multiples multipleAnd: It's up to the server whether the parameter may repeat in order to specify multiple values that must all be true multipleOr: It's up to the server whether the parameter can have multiple values (separated by comma) where at least one must be true 
  http://hl7.org/fhir/SearchParameter/MessageHeader-target2.15.23    target Parameter target:reference
Particular delivery destination within the destination
Resource MessageHeader Expression MessageHeader.destination.targetProcessing Mode Normal Target Resources Device Multiples multipleAnd: It's up to the server whether the parameter may repeat in order to specify multiple values that must all be true multipleOr: It's up to the server whether the parameter can have multiple values (separated by comma) where at least one must be true