gpg --homedir=$PWD --export --armor | gpg --list-packets | grep 'hashed subpkt 20' | sed -e 's/^.*notation: \(.*\)=.*$/\1/' | sort -u -T $PWD

basis@pgp.mwyoung.org
Certification
@comment
COMMENT
DDF51665_stefan@datenfreihafen.org
dsilvers+when@digital-scurf.org
E90C6E2B_certnotes@fabriziotarizzo.org
E90C6E2B_fabrizio@fabriziotarizzo.org
event@
F1E8E6E4_fabrizio@fabriziotarizzo.org
 falco@m4x.org
'@foo
francisco@silva.eti.br
gruber@math.tu-clausthal.de
Level1Introducer@gswot.org
level_of_verification
michael.gruber@mathematik.tu-chemnitz.de
michaeljgruber@fastmail.fm
preferred-email-encoding@pgp.com
pygospa@yahoo.de
@role
signature-notes@penguin.de
signotes@grep.be
srivasta@golden-gryphon.com
vagrant@freegeek.org
@verification-policy
x509certificate@pgp.com