R4 Ballot #2 (Mixed Normative/Trial use)
FoundationThis page is part of the FHIR Specification (v3.5.0: R4 Ballot #2). The current version which supercedes this version is 5.0.0. For a full list of available versions, see the Directory of published versions 
. Page versions: R5 R4B R4 R3 R2
| Modeling and Methodology Work Group | Maturity Level: N/A | Ballot Status: Informative |
Raw JSON (canonical form + also see JSON Format Specification)
StructureDefinition for Extension
{
"resourceType" : "StructureDefinition",
"id" : "Extension",
"meta" : {
"lastUpdated" : "2018-08-19T21:48:56.559+10:00"
},
"text" : {
"status" : "generated",
"div" : "<div>!-- Snipped for Brevity --></div>"
},
"extension" : [{
"url" : "http://hl7.org/fhir/StructureDefinition/structuredefinition-standards-status",
"valueString" : "Normative"
}],
"url" : "http://hl7.org/fhir/StructureDefinition/Extension",
"name" : "Extension",
"status" : "draft",
"date" : "2018-08-19T21:48:56+10:00",
"publisher" : "HL7 FHIR Standard",
"contact" : [{
"telecom" : [{
"system" : "url",
"value" : "http://hl7.org/fhir"
}]
}],
"description" : "Base StructureDefinition for Extension Type: Optional Extension Element - found in all resources.",
"purpose" : "The ability to add extensions in a structured way is what keeps FHIR resources simple.",
"fhirVersion" : "3.5.0",
"mapping" : [{
"identity" : "rim",
"uri" : "http://hl7.org/v3",
"name" : "RIM Mapping"
}],
"kind" : "complex-type",
"abstract" : false,
"type" : "Extension",
"baseDefinition" : "http://hl7.org/fhir/StructureDefinition/Element",
"derivation" : "specialization",
"snapshot" : {
"element" : [{
"id" : "Extension",
"path" : "Extension",
"short" : "Optional Extensions Element",
"definition" : "Optional Extension Element - found in all resources.",
"min" : 0,
"max" : "*",
"base" : {
"path" : "Extension",
"min" : 0,
"max" : "*"
},
"condition" : ["ele-1"],
"constraint" : [{
"key" : "ele-1",
"severity" : "error",
"human" : "All FHIR elements must have a @value or children",
"expression" : "hasValue() or (children().count() > id.count())",
"xpath" : "@value|f:*|h:div",
"source" : "Element"
},
{
"key" : "ext-1",
"severity" : "error",
"human" : "Must have either extensions or value[x], not both",
"expression" : "extension.exists() != value.exists()",
"xpath" : "exists(f:extension)!=exists(f:*[starts-with(local-name(.), 'value')])"
}],
"isModifier" : false,
"mapping" : [{
"identity" : "rim",
"map" : "n/a"
},
{
"identity" : "rim",
"map" : "N/A"
}]
},
{
"id" : "Extension.id",
"path" : "Extension.id",
"representation" : ["xmlAttr"],
"short" : "xml:id (or equivalent in JSON)",
"definition" : "Unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces.",
"min" : 0,
"max" : "1",
"base" : {
"path" : "Element.id",
"min" : 0,
"max" : "1"
},
"type" : [{
"code" : "string"
}],
"isModifier" : false,
"isSummary" : false,
"mapping" : [{
"identity" : "rim",
"map" : "n/a"
}]
},
{
"id" : "Extension.extension",
"path" : "Extension.extension",
"slicing" : {
"discriminator" : [{
"type" : "value",
"path" : "url"
}],
"description" : "Extensions are always sliced by (at least) url",
"rules" : "open"
},
"short" : "Additional content defined by implementations",
"definition" : "May be used to represent additional information that is not part of the basic definition of the element. To make the use of extensions safe and manageable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension.",
"comment" : "There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions. The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone.",
"alias" : ["extensions",
"user content"],
"min" : 0,
"max" : "*",
"base" : {
"path" : "Element.extension",
"min" : 0,
"max" : "*"
},
"type" : [{
"code" : "Extension"
}],
"isModifier" : false,
"isSummary" : false,
"mapping" : [{
"identity" : "rim",
"map" : "n/a"
}]
},
{
"id" : "Extension.url",
"path" : "Extension.url",
"representation" : ["xmlAttr"],
"short" : "identifies the meaning of the extension",
"definition" : "Source of the definition for the extension code - a logical name or a URL.",
"comment" : "The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition SHALL be a URI for the Structure Definition defining the extension.",
"min" : 1,
"max" : "1",
"base" : {
"path" : "Extension.url",
"min" : 1,
"max" : "1"
},
"type" : [{
"_code" : {
"extension" : [{
"url" : "http://hl7.org/fhir/StructureDefinition/structuredefinition-json-type",
"valueString" : "string"
},
{
"url" : "http://hl7.org/fhir/StructureDefinition/structuredefinition-xml-type",
"valueString" : "xsd:string"
},
{
"url" : "http://hl7.org/fhir/StructureDefinition/structuredefinition-rdf-type",
"valueString" : "xsd:string"
},
{
"url" : "http://hl7.org/fhir/StructureDefinition/regex",
"valueString" : "((http|https)://([A-Za-z0-9\\\\\\.\\:\\%\\$]*\\/)*)?(Account|ActivityDefinition|AdverseEvent|AllergyIntolerance|Appointment|AppointmentResponse|AuditEvent|Basic|Binary|BiologicallyDerivedProduct|BodyStructure|Bundle|CapabilityStatement|CarePlan|CareTeam|ChargeItem|ChargeItemDefinition|Claim|ClaimResponse|ClinicalImpression|CodeSystem|Communication|CommunicationRequest|CompartmentDefinition|Composition|ConceptMap|Condition|Consent|Contract|Coverage|CoverageEligibilityRequest|CoverageEligibilityResponse|DetectedIssue|Device|DeviceDefinition|DeviceMetric|DeviceRequest|DeviceUseStatement|DiagnosticReport|DocumentManifest|DocumentReference|Encounter|Endpoint|EnrollmentRequest|EnrollmentResponse|EntryDefinition|EpisodeOfCare|EventDefinition|ExampleScenario|ExplanationOfBenefit|FamilyMemberHistory|Flag|Goal|GraphDefinition|Group|GuidanceResponse|HealthcareService|ImagingStudy|Immunization|ImmunizationEvaluation|ImmunizationRecommendation|ImplementationGuide|InsurancePlan|Invoice|ItemInstance|Library|Linkage|List|Location|Measure|MeasureReport|Media|Medication|MedicationAdministration|MedicationDispense|MedicationKnowledge|MedicationRequest|MedicationStatement|MedicinalProduct|MedicinalProductAuthorization|MedicinalProductClinicals|MedicinalProductContraindication|MedicinalProductDeviceSpec|MedicinalProductIndication|MedicinalProductIngredient|MedicinalProductInteraction|MedicinalProductManufactured|MedicinalProductPackaged|MedicinalProductPharmaceutical|MedicinalProductUndesirableEffect|MessageDefinition|MessageHeader|NamingSystem|NutritionOrder|Observation|ObservationDefinition|OperationDefinition|OperationOutcome|Organization|OrganizationAffiliation|Patient|PaymentNotice|PaymentReconciliation|Person|PlanDefinition|Practitioner|PractitionerRole|Procedure|ProcessRequest|ProcessResponse|Provenance|Questionnaire|QuestionnaireResponse|RelatedPerson|RequestGroup|ResearchStudy|ResearchSubject|RiskAssessment|Schedule|SearchParameter|Sequence|ServiceRequest|Slot|Specimen|SpecimenDefinition|StructureDefinition|StructureMap|Subscription|Substance|SubstancePolymer|SubstanceReferenceInformation|SubstanceSpecification|SupplyDelivery|SupplyRequest|Task|TerminologyCapabilities|TestReport|TestScript|UserSession|ValueSet|VerificationResult|VisionPrescription)\\/[A-Za-z0-9\\-\\.]{1,64}(\\/_history\\/[A-Za-z0-9\\-\\.]{1,64})?"
}]
}
}],
"isModifier" : false,
"isSummary" : false,
"mapping" : [{
"identity" : "rim",
"map" : "N/A"
}]
},
{
"id" : "Extension.value[x]",
"path" : "Extension.value[x]",
"short" : "Value of extension",
"definition" : "Value of extension - may be a resource or one of a constrained set of the data types (see Extensibility in the spec for list).",
"min" : 0,
"max" : "1",
"base" : {
"path" : "Extension.value[x]",
"min" : 0,
"max" : "1"
},
"type" : [{
"code" : "base64Binary"
},
{
"code" : "boolean"
},
{
"code" : "canonical"
},
{
"code" : "code"
},
{
"code" : "date"
},
{
"code" : "dateTime"
},
{
"code" : "decimal"
},
{
"code" : "id"
},
{
"code" : "instant"
},
{
"code" : "integer"
},
{
"code" : "markdown"
},
{
"code" : "oid"
},
{
"code" : "positiveInt"
},
{
"code" : "string"
},
{
"code" : "time"
},
{
"code" : "unsignedInt"
},
{
"code" : "uri"
},
{
"code" : "url"
},
{
"code" : "uuid"
},
{
"code" : "Address"
},
{
"code" : "Age"
},
{
"code" : "Annotation"
},
{
"code" : "Attachment"
},
{
"code" : "CodeableConcept"
},
{
"code" : "Coding"
},
{
"code" : "ContactPoint"
},
{
"code" : "Count"
},
{
"code" : "Distance"
},
{
"code" : "Duration"
},
{
"code" : "HumanName"
},
{
"code" : "Identifier"
},
{
"code" : "Money"
},
{
"code" : "Period"
},
{
"code" : "Quantity"
},
{
"code" : "Range"
},
{
"code" : "Ratio"
},
{
"code" : "Reference"
},
{
"code" : "SampledData"
},
{
"code" : "Signature"
},
{
"code" : "Timing"
},
{
"code" : "ParameterDefinition"
},
{
"code" : "DataRequirement"
},
{
"code" : "RelatedArtifact"
},
{
"code" : "ContactDetail"
},
{
"code" : "Contributor"
},
{
"code" : "TriggerDefinition"
},
{
"code" : "Expression"
},
{
"code" : "UsageContext"
},
{
"code" : "Dosage"
}],
"isModifier" : false,
"isSummary" : false,
"mapping" : [{
"identity" : "rim",
"map" : "N/A"
}]
}]
},
"differential" : {
"element" : [{
"id" : "Extension",
"path" : "Extension",
"short" : "Optional Extensions Element",
"definition" : "Optional Extension Element - found in all resources.",
"min" : 0,
"max" : "*",
"constraint" : [{
"key" : "ext-1",
"severity" : "error",
"human" : "Must have either extensions or value[x], not both",
"expression" : "extension.exists() != value.exists()",
"xpath" : "exists(f:extension)!=exists(f:*[starts-with(local-name(.), 'value')])"
}],
"mapping" : [{
"identity" : "rim",
"map" : "N/A"
}]
},
{
"id" : "Extension.url",
"path" : "Extension.url",
"representation" : ["xmlAttr"],
"short" : "identifies the meaning of the extension",
"definition" : "Source of the definition for the extension code - a logical name or a URL.",
"comment" : "The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition SHALL be a URI for the Structure Definition defining the extension.",
"min" : 1,
"max" : "1",
"type" : [{
"_code" : {
"extension" : [{
"url" : "http://hl7.org/fhir/StructureDefinition/structuredefinition-json-type",
"valueString" : "string"
},
{
"url" : "http://hl7.org/fhir/StructureDefinition/structuredefinition-xml-type",
"valueString" : "xsd:string"
},
{
"url" : "http://hl7.org/fhir/StructureDefinition/structuredefinition-rdf-type",
"valueString" : "xsd:string"
},
{
"url" : "http://hl7.org/fhir/StructureDefinition/regex",
"valueString" : "((http|https)://([A-Za-z0-9\\\\\\.\\:\\%\\$]*\\/)*)?(Account|ActivityDefinition|AdverseEvent|AllergyIntolerance|Appointment|AppointmentResponse|AuditEvent|Basic|Binary|BiologicallyDerivedProduct|BodyStructure|Bundle|CapabilityStatement|CarePlan|CareTeam|ChargeItem|ChargeItemDefinition|Claim|ClaimResponse|ClinicalImpression|CodeSystem|Communication|CommunicationRequest|CompartmentDefinition|Composition|ConceptMap|Condition|Consent|Contract|Coverage|CoverageEligibilityRequest|CoverageEligibilityResponse|DetectedIssue|Device|DeviceDefinition|DeviceMetric|DeviceRequest|DeviceUseStatement|DiagnosticReport|DocumentManifest|DocumentReference|Encounter|Endpoint|EnrollmentRequest|EnrollmentResponse|EntryDefinition|EpisodeOfCare|EventDefinition|ExampleScenario|ExplanationOfBenefit|FamilyMemberHistory|Flag|Goal|GraphDefinition|Group|GuidanceResponse|HealthcareService|ImagingStudy|Immunization|ImmunizationEvaluation|ImmunizationRecommendation|ImplementationGuide|InsurancePlan|Invoice|ItemInstance|Library|Linkage|List|Location|Measure|MeasureReport|Media|Medication|MedicationAdministration|MedicationDispense|MedicationKnowledge|MedicationRequest|MedicationStatement|MedicinalProduct|MedicinalProductAuthorization|MedicinalProductClinicals|MedicinalProductContraindication|MedicinalProductDeviceSpec|MedicinalProductIndication|MedicinalProductIngredient|MedicinalProductInteraction|MedicinalProductManufactured|MedicinalProductPackaged|MedicinalProductPharmaceutical|MedicinalProductUndesirableEffect|MessageDefinition|MessageHeader|NamingSystem|NutritionOrder|Observation|ObservationDefinition|OperationDefinition|OperationOutcome|Organization|OrganizationAffiliation|Patient|PaymentNotice|PaymentReconciliation|Person|PlanDefinition|Practitioner|PractitionerRole|Procedure|ProcessRequest|ProcessResponse|Provenance|Questionnaire|QuestionnaireResponse|RelatedPerson|RequestGroup|ResearchStudy|ResearchSubject|RiskAssessment|Schedule|SearchParameter|Sequence|ServiceRequest|Slot|Specimen|SpecimenDefinition|StructureDefinition|StructureMap|Subscription|Substance|SubstancePolymer|SubstanceReferenceInformation|SubstanceSpecification|SupplyDelivery|SupplyRequest|Task|TerminologyCapabilities|TestReport|TestScript|UserSession|ValueSet|VerificationResult|VisionPrescription)\\/[A-Za-z0-9\\-\\.]{1,64}(\\/_history\\/[A-Za-z0-9\\-\\.]{1,64})?"
}]
}
}],
"mapping" : [{
"identity" : "rim",
"map" : "N/A"
}]
},
{
"id" : "Extension.value[x]",
"path" : "Extension.value[x]",
"short" : "Value of extension",
"definition" : "Value of extension - may be a resource or one of a constrained set of the data types (see Extensibility in the spec for list).",
"min" : 0,
"max" : "1",
"type" : [{
"code" : "base64Binary"
},
{
"code" : "boolean"
},
{
"code" : "canonical"
},
{
"code" : "code"
},
{
"code" : "date"
},
{
"code" : "dateTime"
},
{
"code" : "decimal"
},
{
"code" : "id"
},
{
"code" : "instant"
},
{
"code" : "integer"
},
{
"code" : "markdown"
},
{
"code" : "oid"
},
{
"code" : "positiveInt"
},
{
"code" : "string"
},
{
"code" : "time"
},
{
"code" : "unsignedInt"
},
{
"code" : "uri"
},
{
"code" : "url"
},
{
"code" : "uuid"
},
{
"code" : "Address"
},
{
"code" : "Age"
},
{
"code" : "Annotation"
},
{
"code" : "Attachment"
},
{
"code" : "CodeableConcept"
},
{
"code" : "Coding"
},
{
"code" : "ContactPoint"
},
{
"code" : "Count"
},
{
"code" : "Distance"
},
{
"code" : "Duration"
},
{
"code" : "HumanName"
},
{
"code" : "Identifier"
},
{
"code" : "Money"
},
{
"code" : "Period"
},
{
"code" : "Quantity"
},
{
"code" : "Range"
},
{
"code" : "Ratio"
},
{
"code" : "Reference"
},
{
"code" : "SampledData"
},
{
"code" : "Signature"
},
{
"code" : "Timing"
},
{
"code" : "ParameterDefinition"
},
{
"code" : "DataRequirement"
},
{
"code" : "RelatedArtifact"
},
{
"code" : "ContactDetail"
},
{
"code" : "Contributor"
},
{
"code" : "TriggerDefinition"
},
{
"code" : "Expression"
},
{
"code" : "UsageContext"
},
{
"code" : "Dosage"
}],
"mapping" : [{
"identity" : "rim",
"map" : "N/A"
}]
}]
}
}
Usage note: every effort has been made to ensure that the examples are correct and useful, but they are not a normative part of the specification.
®© HL7.org 2011+. FHIR Mixed Nomative/Trial Use Ballot #2 (v3.5.0-14907) generated on Sun, Aug 19, 2018 21:52+1000. QA Page
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