1. Header
     CDA authenticator (2.16.840.1.113883.10.12.107)
    1. *
       CDA AssignedEntity (2.16.840.1.113883.10.12.153)
      1. *
         CDA Person (2.16.840.1.113883.10.12.152)
      2. *
         CDA Organization (2.16.840.1.113883.10.12.151)