In reply to Asad Makki.

Thanks, The various formats are documented in the admin guide.

https://go.documentation.sas.com/?cdcId=calcdc&cdcVersion=3.5&docsetId=calopsinf&docsetTarget=n01k7jf9i6qtpvn1a6o9rppi52j8.htm&locale=en

You can also get a list using -h with the sas-ops command.
/opt/sas/viya/home/bin/sas-ops logs -h

OPTIONS:
--format format Output format of log messages (json|pretty|line|file|term|plain|logfmt|template|event) (default "term")