{

"resourceType": "CodeSystem",
"id": "search-modifier-code",
"meta": {
  "lastUpdated": "2019-11-01T09:29:23.356+11:00"
},
"extension": [
  {
    "url": "http://hl7.org/fhir/StructureDefinition/structuredefinition-wg",
    "valueCode": "fhir"
  },
  {
    "url": "http://hl7.org/fhir/StructureDefinition/structuredefinition-standards-status",
    "valueCode": "trial-use"
  },
  {
    "url": "http://hl7.org/fhir/StructureDefinition/structuredefinition-fmm",
    "valueInteger": 3
  }
],
"url": "http://hl7.org/fhir/search-modifier-code",
"identifier": [
  {
    "system": "urn:ietf:rfc:3986",
    "value": "urn:oid:2.16.840.1.113883.4.642.4.640"
  }
],
"version": "4.0.1",
"name": "SearchModifierCode",
"title": "SearchModifierCode",
"status": "draft",
"experimental": false,
"date": "2019-11-01T09:29:23+11:00",
"publisher": "HL7 (FHIR Project)",
"contact": [
  {
    "telecom": [
      {
        "system": "url",
        "value": "http://hl7.org/fhir"
      },
      {
        "system": "email",
        "value": "fhir@lists.hl7.org"
      }
    ]
  }
],
"description": "A supported modifier for a search parameter.",
"caseSensitive": true,
"valueSet": "http://hl7.org/fhir/ValueSet/search-modifier-code",
"content": "complete",
"concept": [
  {
    "code": "missing",
    "display": "Missing",
    "definition": "The search parameter returns resources that have a value or not."
  },
  {
    "code": "exact",
    "display": "Exact",
    "definition": "The search parameter returns resources that have a value that exactly matches the supplied parameter (the whole string, including casing and accents)."
  },
  {
    "code": "contains",
    "display": "Contains",
    "definition": "The search parameter returns resources that include the supplied parameter value anywhere within the field being searched."
  },
  {
    "code": "not",
    "display": "Not",
    "definition": "The search parameter returns resources that do not contain a match."
  },
  {
    "code": "text",
    "display": "Text",
    "definition": "The search parameter is processed as a string that searches text associated with the code/value - either CodeableConcept.text, Coding.display, or Identifier.type.text."
  },
  {
    "code": "in",
    "display": "In",
    "definition": "The search parameter is a URI (relative or absolute) that identifies a value set, and the search parameter tests whether the coding is in the specified value set."
  },
  {
    "code": "not-in",
    "display": "Not In",
    "definition": "The search parameter is a URI (relative or absolute) that identifies a value set, and the search parameter tests whether the coding is not in the specified value set."
  },
  {
    "code": "below",
    "display": "Below",
    "definition": "The search parameter tests whether the value in a resource is subsumed by the specified value (is-a, or hierarchical relationships)."
  },
  {
    "code": "above",
    "display": "Above",
    "definition": "The search parameter tests whether the value in a resource subsumes the specified value (is-a, or hierarchical relationships)."
  },
  {
    "code": "type",
    "display": "Type",
    "definition": "The search parameter only applies to the Resource Type specified as a modifier (e.g. the modifier is not actually :type, but :Patient etc.)."
  },
  {
    "code": "identifier",
    "display": "Identifier",
    "definition": "The search parameter applies to the identifier on the resource, not the reference."
  },
  {
    "code": "ofType",
    "display": "Of Type",
    "definition": "The search parameter has the format system|code|value, where the system and code refer to an Identifier.type.coding.system and .code, and match if any of the type codes match. All 3 parts must be present."
  }
]

}