`sig
val ce_authority_key_identifier : Netx509.oid
val ce_subject_key_identifier : Netx509.oid
val ce_key_usage : Netx509.oid
val ce_certificate_policies : Netx509.oid
val ce_any_policy : Netx509.oid
val ce_policy_mappings : Netx509.oid
val ce_subject_alt_name : Netx509.oid
val ce_issuer_alt_name : Netx509.oid
val ce_subject_directory_attributes : Netx509.oid
val ce_basic_constraints : Netx509.oid
val ce_name_constraints : Netx509.oid
val ce_policy_constraints : Netx509.oid
val ce_ext_key_usage : Netx509.oid
val ce_crl_distribution_points : Netx509.oid
val ce_inhibit_any_policy : Netx509.oid
val ce_freshest_crl : Netx509.oid
val ce_authority_info_access : Netx509.oid
val ce_subject_info_access : Netx509.oid
val certificate_extensions : (Netx509.oid * string) list
end`