Code System Hierarchy Meaning

{
  "description" : "The meaning of the hierarchy of concepts in a code system.",
  "date" : "2021-01-05T10:01:24+11:00",
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  "name" : "CodeSystemHierarchyMeaning",
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  "resourceType" : "CodeSystem",
  "title" : "Code System Hierarchy Meaning",
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    "div" : "<div xmlns=\"http://www.w3.org/1999/xhtml\">\n            <p>This code system \n              <code>http://hl7.org/fhir/codesystem-hierarchy-meaning</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\">grouped-by\n                  <a name=\"codesystem-hierarchy-meaning-grouped-by\"> </a>\n                </td>\n                <td>Grouped By</td>\n                <td>No particular relationship between the concepts can be assumed, except what can be determined by inspection of the definitions of the elements (possible reasons to use this: importing from a source where this is not defined, or where various parts of the hierarchy have different meanings).</td>\n              </tr>\n              <tr>\n                <td style=\"white-space:nowrap\">is-a\n                  <a name=\"codesystem-hierarchy-meaning-is-a\"> </a>\n                </td>\n                <td>Is-A</td>\n                <td>A hierarchy where the child concepts have an IS-A relationship with the parents - that is, all the properties of the parent are also true for its child concepts. Not that is-a is a property of the concepts, so additional subsumption relationships may be defined using properties.</td>\n              </tr>\n              <tr>\n                <td style=\"white-space:nowrap\">part-of\n                  <a name=\"codesystem-hierarchy-meaning-part-of\"> </a>\n                </td>\n                <td>Part Of</td>\n                <td>Child elements list the individual parts of a composite whole (e.g. body site).</td>\n              </tr>\n              <tr>\n                <td style=\"white-space:nowrap\">classified-with\n                  <a name=\"codesystem-hierarchy-meaning-classified-with\"> </a>\n                </td>\n                <td>Classified With</td>\n                <td>Child concepts in the hierarchy may have only one parent, and there is a presumption that the code system is a &quot;closed world&quot; meaning all things must be in the hierarchy. This results in concepts such as &quot;not otherwise classified.&quot;.</td>\n              </tr>\n            </table>\n          </div>",
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