Type Derivation Rule

{
  "description" : "How a type relates to its baseDefinition.",
  "date" : "2021-01-05T10:01:24+11:00",
  "meta" : {
    "lastUpdated" : "2023-03-26T15:21:02.749+11:00",
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      "code" : "001",
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  "content" : "complete",
  "property" : null,
  "name" : "TypeDerivationRule",
  "experimental" : false,
  "resourceType" : "CodeSystem",
  "title" : "Type Derivation Rule",
  "extension" : [ {
    "valueCode" : "fhir",
    "url" : "http://hl7.org/fhir/StructureDefinition/structuredefinition-wg"
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  "status" : "active",
  "id" : "9a5357de-bc4f-4ed6-898a-fd034bd3aa03",
  "valueSet" : "http://hl7.org/fhir/ValueSet/type-derivation-rule",
  "url" : "http://hl7.org/fhir/type-derivation-rule",
  "identifier" : [ {
    "system" : "urn:ietf:rfc:3986",
    "value" : "urn:oid:2.16.840.1.113883.4.642.4.674"
  }, {
    "system" : "urn:ietf:rfc:3986",
    "use" : "old",
    "value" : "urn:oid:2.16.840.1.113883.4.642.1.660"
  } ],
  "caseSensitive" : true,
  "version" : "5.0.0",
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  "text" : {
    "div" : "<div xmlns=\"http://www.w3.org/1999/xhtml\">\n            <p>This code system \n              <code>http://hl7.org/fhir/type-derivation-rule</code> defines the following codes:\n            </p>\n            <table class=\"codes\">\n              <tr>\n                <td style=\"white-space:nowrap\">\n                  <b>Code</b>\n                </td>\n                <td>\n                  <b>Display</b>\n                </td>\n                <td>\n                  <b>Definition</b>\n                </td>\n              </tr>\n              <tr>\n                <td style=\"white-space:nowrap\">specialization\n                  <a name=\"type-derivation-rule-specialization\"> </a>\n                </td>\n                <td>Specialization</td>\n                <td>This definition defines a new type that adds additional elements and optionally additional rules to the base type.</td>\n              </tr>\n              <tr>\n                <td style=\"white-space:nowrap\">constraint\n                  <a name=\"type-derivation-rule-constraint\"> </a>\n                </td>\n                <td>Constraint</td>\n                <td>This definition adds additional rules to an existing concrete type.</td>\n              </tr>\n            </table>\n          </div>",
    "status" : "generated"
  }
}