Batch processing

Hello,

I am using omnigraffle to visualize a very huge graph. I have the  
graph in dot and I would like omnigraffle to render it for me.  
Everything is fine so far and for small graphs there is no problem;  
however, I would like to know if it is possible to use omnigraffle to  
do the same but in batch. I mean, as the graph is quite large it will  
take some time to render, and I would like to do something like this:

./omnigraffle input.dot output.graffle

is it possible to do something like that?


Regards,
Gustavo