{"resourceType":"StructureDefinition","id":"CodeSystem.versionNeeded","meta":{"lastUpdated":"2021-01-17T07:06:13.533+11:00"},"url":"http://hl7.org/fhir/StructureDefinition/CodeSystem.versionNeeded","version":"4.0.1","name":"CodeSystem.versionNeeded","title":"CodeSystem.versionNeeded","status":"draft","experimental":true,"date":"2021-01-17T07:06:13+11:00","publisher":"HL7 FHIR Standard","contact":[{"telecom":[{"system":"url","value":"http://hl7.org/fhir"}]}],"description":"Data Element for CodeSystem.versionNeeded","purpose":"Data Elements are defined for each element to assist in questionnaire construction etc","fhirVersion":"4.0.1","mapping":[{"identity":"rim","uri":"http://hl7.org/v3","name":"RIM Mapping"},{"identity":"w5","uri":"http://hl7.org/fhir/fivews","name":"FiveWs Pattern Mapping"},{"identity":"workflow","uri":"http://hl7.org/fhir/workflow","name":"Workflow Pattern"},{"identity":"objimpl","uri":"http://hl7.org/fhir/object-implementation","name":"Object Implementation Information"}],"kind":"logical","abstract":false,"type":"CodeSystem.versionNeeded","baseDefinition":"http://hl7.org/fhir/StructureDefinition/Element","derivation":"specialization","snapshot":{"element":[{"id":"CodeSystem.versionNeeded","path":"CodeSystem.versionNeeded","short":"If definitions are not stable","definition":"This flag is used to signify that the code system does not commit to concept permanence across versions. If true, a version must be specified when referencing this code system.","comment":"Best practice is that code systems do not redefine concepts, or that if concepts are redefined, a new code system definition is created. But this is not always possible, so some code systems may be defined as 'versionNeeded'.\n\nMost code systems occasionally refine the displays defined for concepts between versions. Contexts in which the concept display values are validated may require that the version be specified for some code systems irrespective of the value of this property.","min":0,"max":"1","base":{"path":"CodeSystem.versionNeeded","min":0,"max":"1"},"type":[{"code":"boolean"}],"isModifier":false,"isSummary":true}]}}