Cross-Version Extension for CodeSystem.identifier in R4

Context of Use

This extension may be used in the following contexts:

• element CodeSystem (For version R3)
• extension http://hl7.org/fhir/3.0/StructureDefinition/extension-CodeSystem
• element ValueSet (For version R2)
• extension http://hl7.org/fhir/1.0/StructureDefinition/extension-ValueSet

Name	Flags	Card.	Type	Description & Constraints
Extension		0..*	Extension	Additional identifier for the code system (business identifier)
extension		..0
value[x]		1..	Identifier
url				"http://hl7.org/fhir/4.0/StructureDefinition/extension-CodeSystem.identifier"
Documentation for this format

{
  "resourceType" : "StructureDefinition",
  "id" : "xv-r4-csd.identifier",
  "url" : "http://hl7.org/fhir/4.0/StructureDefinition/extension-CodeSystem.identifier",
  "name" : "XVerExtensionCodeSystem.identifierR4",
  "title" : "Cross-Version Extension for CodeSystem.identifier in R4",
  "status" : "active",
  "experimental" : false,
  "publisher" : "Health Level Seven International (Vocabulary)",
  "contact" : [{
    "telecom" : [{
      "system" : "url",
      "value" : "http://hl7.org/fhir"
    }]
  },
  {
    "telecom" : [{
      "system" : "url",
      "value" : "http://www.hl7.org/Special/committees/Vocab/index.cfm"
    }]
  }],
  "description" : "Cross-Version Extension for CodeSystem.identifier. Valid in versions R2, R3\r\n\r\nThis is a valid cross-version extension because the cardinality changed",
  "jurisdiction" : [{
    "coding" : [{
      "system" : "http://unstats.un.org/unsd/methods/m49/m49.htm",
      "code" : "001"
    }]
  }],
  "fhirVersion" : "5.0.0",
  "kind" : "complex-type",
  "abstract" : false,
  "context" : [{
    "extension" : [{
      "extension" : [{
        "url" : "startFhirVersion",
        "valueCode" : "3.0"
      },
      {
        "url" : "endFhirVersion",
        "valueCode" : "3.0"
      }],
      "url" : "http://hl7.org/fhir/StructureDefinition/version-specific-use"
    }],
    "type" : "element",
    "expression" : "CodeSystem"
  },
  {
    "type" : "extension",
    "expression" : "http://hl7.org/fhir/3.0/StructureDefinition/extension-CodeSystem"
  },
  {
    "extension" : [{
      "extension" : [{
        "url" : "startFhirVersion",
        "valueCode" : "1.0"
      },
      {
        "url" : "endFhirVersion",
        "valueCode" : "1.0"
      }],
      "url" : "http://hl7.org/fhir/StructureDefinition/version-specific-use"
    }],
    "type" : "element",
    "expression" : "ValueSet"
  },
  {
    "type" : "extension",
    "expression" : "http://hl7.org/fhir/1.0/StructureDefinition/extension-ValueSet"
  }],
  "type" : "Extension",
  "baseDefinition" : "http://hl7.org/fhir/StructureDefinition/Extension",
  "derivation" : "constraint",
  "differential" : {
    "element" : [{
      "path" : "Extension",
      "short" : "Additional identifier for the code system (business identifier)",
      "definition" : "A formal identifier that is used to identify this code system when it is represented in other formats, or referenced in a specification, model, design or an instance.",
      "comment" : "Typically, this is used for identifiers that can go in an HL7 V3 II (instance identifier) data type, and can then identify this code system outside of FHIR, where it is not possible to use the logical URI.  Note that HL7 defines at least three identifiers for many of its code systems - the FHIR canonical URL, the OID and the V2 Table 0396 mnemonic code.",
      "requirements" : "Allows externally provided and/or usable business identifiers to be easily associated with the module.",
      "min" : 0,
      "max" : "*",
      "isModifier" : false,
      "mapping" : [{
        "identity" : "workflow",
        "map" : "Definition.identifier"
      },
      {
        "identity" : "w5",
        "map" : "FiveWs.identifier"
      },
      {
        "identity" : "objimpl",
        "map" : "no-gen-base"
      }]
    },
    {
      "path" : "Extension.extension",
      "max" : "0"
    },
    {
      "path" : "Extension.value[x]",
      "min" : 1,
      "type" : [{
        "code" : "Identifier"
      }]
    },
    {
      "path" : "Extension.url",
      "fixedUri" : "http://hl7.org/fhir/4.0/StructureDefinition/extension-CodeSystem.identifier"
    }]
  }
}