Dear ALAC, SSAC has published Report on Root Service Early Warning Systems available here: https://www.icann.org/en/system/files/files/sac-117-en.pdf This is a comprehensive document with the roots coming from a set of documents startning 2009 and evolved through the years up to date. Please note, this document has a lot of technical details. Yours, --andrei -- Andrey Kolesnikov