http://www.rfc-editor.org/rfc/rfc7848.txt
RFC 7848: Mark and Signed Mark Objects Mapping, G. Lozano2016-06-01T23:00:00-00:00This document describes the format of a mark and a digitally signed mark used by trademark holders for registering domain names during the Sunrise Period of generic Top-Level Domains (gTLDs). Three types of Mark objects are defined in this specification: registered trademarks, court-validated marks, and marks protected by statue or treaty.