1. Header
     CDA author SDTC (2.16.840.1.113883.10.12.602)
    1. Header
       CDA Person SDTC (2.16.840.1.113883.10.12.652)
    2. Entry
       CDA Device SDTC (2.16.840.1.113883.10.12.815)
    3. Header
       CDA Organization SDTC (2.16.840.1.113883.10.12.651)