Where are ISC docs for log file codings?

[Brett Delmage]

Where is the documentation for how to interpret log file content?

Specifically for me now that's the query log including the flags. But it 
could be other log files too at times. I am running DNSSEC and primary, 
secondary, and internal resolving servers so many logs are of interest at 
different times.

I've found third party info that is obviously not authoritative, asked 
duck.ai Mistral (sounded good but who knows if it's hallucinating!) but I 
did not find the ISC docs if they exist.

Thanks.