v2 MIME base64 encoding Characters

{
  "description" : "FHIR Value set/code system definition for HL7 v2 table 0290 ( MIME base64 encoding Characters)",
  "compose" : {
    "exclude" : [ ],
    "include" : [ {
      "system" : "http://terminology.hl7.org/CodeSystem/v2-0290"
    } ]
  },
  "meta" : {
    "profile" : [ "http://hl7.org/fhir/StructureDefinition/shareablevalueset" ]
  },
  "publisher" : "HL7, Inc",
  "name" : "v2.0290",
  "experimental" : false,
  "resourceType" : "ValueSet",
  "title" : "v2 MIME base64 encoding Characters",
  "extension" : [ {
    "valueCode" : "external",
    "url" : "http://hl7.org/fhir/StructureDefinition/structuredefinition-standards-status"
  }, {
    "url" : "http://hl7.org/fhir/StructureDefinition/structuredefinition-fmm",
    "valueInteger" : 0
  }, {
    "url" : "http://health-samurai.io/extensions/source",
    "valueCode" : "db"
  } ],
  "status" : "active",
  "language" : "en",
  "id" : "v2-0290",
  "url" : "http://terminology.hl7.org/ValueSet/v2-0290",
  "immutable" : true,
  "version" : "2.9",
  "contact" : [ {
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      "value" : "http://hl7.org"
    } ]
  } ]
}