That would be the PEGs section.
Thanks for sharing that tid-bit, @Michael_Ilseman. Though it may be helpful for future readers to know that, as best I understand it, the PEG sections in both of your posts only discuss the theoretical advantages (and disadvantages) of PEGs vs regexes without any sample syntax. That being said, I have enjoyed reading everything you've written on the topic. It's given me a lot to think about! 