In accordance with Federate compliance checklist item 1, 
a federate must have a Simulation Object Model in the OMT 
format.  In order to facilitate automated testing, the 
SOM will be tested using the Object Model Template (OMT)
Data Interchange Format (DIF).  The DIF is a standard file 
exchange format used to store and transfer object models 
between OMT development tools.  If you use the Object Model
Development Tool (OMDT) to create your SOM, save the object
model as a .omt file.

The current version of the OMT DIF for v1.3 is described in
detail in Annex E of the OMT Specification v1.3.