{
  "resourceType" : "SearchParameter",
  "id" : "observation-genetic-Observation-dna-variant",
  "url" : "http://hl7.org/fhir/SearchParameter/observation-genetic-Observation-dna-variant",
  "name" : "dna-variant",
  "status" : "draft",
  "experimental" : true,
  "description" : "HGVS DNA variant",
  "code" : "dna-variant",
  "base" : ["Observation"],
  "type" : "string",
  "expression" : "Observation.extension('http://hl7.org/fhir/StructureDefinition/observation-geneticsDnaVariant')",
  "xpathUsage" : "normal",
  "multipleOr" : true,
  "multipleAnd" : true
}