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    my $asn_ext = Convert::ASN1->new;
    $asn_ext->prepare( $Biblio::ILL::ISO::1_0_10161_13_3::desc );
...
    # "1" is what it *is*, by looking at a hex dump of the request rec
+ord
    $_asn->registeroid("1",$asn_ext->find("APDU-Delivery-Info"));

sub encode {
    my $self = shift;
...
    my $pdu = $asn->encode( $href ) or warn $asn->error;
    return $pdu;
}

sub decode {
    my $self = shift;
...
    my $href = $asn->decode( $pdu ) or warn $asn->error;
    return $href;
}