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{"code" : {
  "code" : "http://hl7.org/fhirpath/System.String"
}, "valueSet" :{
  "resourceType" : "ValueSet",
  "compose" : {
    "include" : [{
      "system" : "http://hl7.org/fhir/data-types"
    },
    {
      "system" : "http://hl7.org/fhir/resource-types"
    }]
  }
}, "lang":"null", "useServer":"true", "useClient":"true", "guessSystem":"false", "valueSetMode":"ALL_CHECKS"}####
v: {
  "display" : "",
  "severity" : "error",
  "error" : "The code system \"\" is not known (encountered paired with code = \"http://hl7.org/fhirpath/System.String\"); The code provided (#http://hl7.org/fhirpath/System.String) is not  valid in the value set FHIRDefinedType"
}
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