Operation Definition

{
  "resourceType" : "OperationDefinition",
  "id" : "List-find",
  "text" : {
    "status" : "extensions",
    "div" : "<div>!-- Snipped for Brevity --></div>"
  },
  "extension" : [{
    "url" : "http://hl7.org/fhir/StructureDefinition/structuredefinition-fmm",
    "valueInteger" : 1
  },
  {
    "url" : "http://hl7.org/fhir/StructureDefinition/structuredefinition-standards-status",
    "valueCode" : "trial-use"
  }],
  "url" : "http://hl7.org/fhir/OperationDefinition/List-find",
  "version" : "5.0.0-ballot",
  "name" : "Find",
  "title" : "Find a functional list",
  "status" : "draft",
  "kind" : "operation",
  "experimental" : false,
  "date" : "2022-09-07T10:58:29+10:00",
  "publisher" : "HL7 (FHIR Project)",
  "contact" : [{
    "telecom" : [{
      "system" : "url",
      "value" : "http://hl7.org/fhir"
    },
    {
      "system" : "email",
      "value" : "fhir@lists.hl7.org"
    }]
  }],
  "description" : "This operation allows a client to find an identified list for a particular function by its function. The operation takes two parameters, the identity of a patient, and the name of a functional list.     The list of defined functional lists can be found at [Current Resource Lists](lifecycle.html#lists). Applications are not required to support all the lists, and may define additional lists of their own.   If the system is able to locate a list that serves the identified purpose, it returns it as the body of the response with a 200 OK status. If the resource cannot be located, the server returns a 404 not found (optionally with an OperationOutcome resource)",
  "affectsState" : false,
  "code" : "find",
  "comment" : "Note that servers may support searching by a functional list, and not support this operation that allows clients to find the list directly",
  "resource" : ["List"],
  "system" : false,
  "type" : true,
  "instance" : false,
  "parameter" : [{
    "name" : "patient",
    "use" : "in",
    "min" : 1,
    "max" : "1",
    "documentation" : "The id of a patient resource located on the server on which this operation is executed",
    "type" : "id"
  },
  {
    "name" : "name",
    "use" : "in",
    "min" : 1,
    "max" : "1",
    "documentation" : "The code for the functional list that is being found",
    "type" : "code"
  }]
}