
  </tr>
  <tr>
    <td><b>url</b></td>
    <td>recommended</td>
    <td>The URL at which the specification that the package represents may be found</td>
  </tr>
  <tr>
    <td><b>type</b></td>
    <td>recommended</td>
    <td>The type of resources that the package contains. The type may be
      one of the following values:
      <ul>
        <li><b>Conformance</b> - a set of Conformance Resources in the base package folder (/package)</li>
        <li><b>IG</b> - a FHIR implementation guide p