{
  "resourceType": "SearchParameter",
  "id": "Substance-code",
  "url": "http://hl7.org/fhir/SearchParameter/Substance-code",
  "name": "code",
  "status": "draft",
  "experimental": false,
  "publisher": "Health Level Seven International (Orders and Observations)",
  "contact": [
    {
      "telecom": [
        {
          "system": "url",
          "value": "http://hl7.org/fhir"
        }
      ]
    },
    {
      "telecom": [
        {
          "system": "url",
          "value": "http://www.hl7.org/Special/committees/orders/index.cfm"
        }
      ]
    }
  ],
  "code": "code",
  "base": [
    "Substance"
  ],
  "type": "token",
  "description": "The code of the substance or ingredient",
  "expression": "Substance.code | Substance.ingredient.substance.as(CodeableConcept)",
  "xpath": "f:Substance/f:code | f:Substance/f:ingredient/f:substanceCodeableConcept",
  "xpathUsage": "normal"
}