enablesid.conf format

[nominal6]

Hello,

I would like to know the meaning of the first digit in enablesid.conf.  For instance, for a Snort rule of:

alert icmp $EXTERNAL_NET any -> $HOME_NET any (msg:"DDOS TFN Probe"; icmp_id:678; itype:8; content:"1234"; rev:4;)

The sid would be 678.  On the other hand, enablesid.conf has examples like:

'1:1034,1:9837'

1034 would be the sid, but what does the '1:' stands for ?

I'm starting with pulledpork and I already have a set of enabled rules that I want PP to work with.  So far, the only way of doing that is to port all those enabled rules into PP's enablesid.conf.  Or, is there a utility to do that ?

Thanks !