1. Header
     CDA participant (2.16.840.1.113883.2.9.77.1.10.900222)
    1. Header
       CDA Person Elements (2.16.840.1.113883.2.9.77.1.10.900200)
    2. Header
       CDA Organization Elements (2.16.840.1.113883.2.9.77.1.10.900201)