Getting info out of the macOS Unified Logging System

Related to some projects I ve been working on to get data out of the macOS ULS in a usable format for Splunk, I realized that it s kind of a pain to figure out what to sift through via predicates. Like the subsystems are easy, they re all in /System/Library/Preferences/Logging/Subsystems/. But the categories and senders and processes [ ]