%% You should probably cite rfc7410 instead of this I-D. @techreport{ietf-appsawg-authres-ptypes-registry-03, number = {draft-ietf-appsawg-authres-ptypes-registry-03}, type = {Internet-Draft}, institution = {Internet Engineering Task Force}, publisher = {Internet Engineering Task Force}, note = {Work in Progress}, url = {https://datatracker.ietf.org/doc/draft-ietf-appsawg-authres-ptypes-registry/03/}, author = {Murray Kucherawy}, title = {{A Property Types Registry for the Authentication-Results Header Field}}, pagetotal = 5, year = 2014, month = sep, day = 16, abstract = {This document updates RFC7001 by creating a registry for property types in the Authentication-Results header field, used in email authentication work, rather than limiting participants to using the original, small set of fixed values.}, }