The Body element is defined in the Calendar
namespace, as specified in section 2.2.2.7.2, for use
by protocol version 2.5. It is defined in the AirSyncBase namespace, as
specified in section 2.2.2.7.1, for use
by protocol versions 12.0, 12.1, 14.0, 14.1, 16.0 and 16.1.