OID key *
This is a unique idenitifier for the OID and is used in the source code to refer to that OID. Usually we use some variation of the OID name.
Snmpoid *
This is the actual numeric OID.
OID source
This field does not have a good name; I it is supposed to be from which subsystem the OID comes from, but I think it is used by cricket to identify the OID that it collects. If the OID source is 'cricket' then cricket will collect data for this OID (JM: correct me if I am wrong).
Match regexp
The data collected from an OID must match this regex (if it is not null, in which case everything matches which is the normal case) if data is to be collected.
OID name MIB Description
These are just description fields.
-- Kristian