{
  "resourceType" : "SearchParameter",
  // from Resource: id, meta, implicitRules, and language
  // from DomainResource: text, contained, extension, and modifierExtension
  "url" : "<uri>", // R!  Absolute URL used to reference this search parameter
  "name" : "<string>", // R!  Informal name for this search parameter
  "status" : "<code>", // draft | active | retired
  "experimental" : <boolean>, // If for testing purposes, not real usage
  "publisher" : "<string>", // Name of the publisher (Organization or individual)
  "contact" : [{ // Contact details of the publisher
    "name" : "<string>", // Name of a individual to contact
    "telecom" : [{ ContactPoint }] // Contact details for individual or publisher
  }],
  "date" : "<dateTime>", // Publication Date(/time)
  "requirements" : "<string>", // Why this search parameter is defined
  "code" : "<code>", // R!  Code used in URL
  "base" : "<code>", // R!  The resource type this search parameter applies to
  "type" : "<code>", // R!  number | date | string | token | reference | composite | quantity | uri
  "description" : "<string>", // R!  Documentation for  search parameter
  "xpath" : "<string>", // C? XPath that extracts the values
  "xpathUsage" : "<code>", // C? normal | phonetic | nearby | distance | other
  "target" : ["<code>"] // Types of resource (if a resource reference)
}