config.Y grammar for a new protocol

[Vinod Padmanabhan]

Hi,

I would like to know how to add a config.Y file for any new protocol in 
Bird2.0. For example, if my config file looks like:

ipv4 table xyz;

protocol new {
      ipv4 {
              table xyz;
            import all;
            export where source = RTS_BGP;
            };
}
How will the corresponding grammar look like?

Thanks,
Vinod