All Omni Interface Documents (OIDs) begin with the OmniPatientInterface root tag. The inclusion of this outer wrapper allows multiple Subjects to be submitted in the same OID.
The following is a basic structure of an OID:
<?xml version="1.0" encoding="UTF-8"?> <OmniPatientInterface > <OmniObject /> <OmniObject /> <OmniObject /> </OmniPatientInterface >