https://app.knowbase.one/vault/rfc/docid/5110
RFC4685: Atom Threading Extensions
Network Working Group J. Snell Request for Comments: 4685 September 2006 Category: Standards Track Atom Threading Extensions Status of This Memo This document specifies an Internet standards ...
https://app.knowbase.one/vault/rfc/docid/5730
RFC5256: Internet Message Access Protocol - SORT and THREAD Extensions
Network Working Group M. Crispin Request for Comments: 5256 Panda Programming Category: Standards Track K. Murchison Carnegie Mellon University ...