According to the X.509, a certificate has an attribute subject.
C=US, ST=Maryland, L=Pasadena, O=Brent Baccala, OU=FreeSoft,
CN=www.freesoft.org/emailAddress=baccala@freesoft.org
This is the typical subject value. The question is what are the types(or tags) of those attributes(C, ST, L, O, OU, CN) and what is their format?
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