libmarc-lint-perl 1.46-1 / usr / share / perl5 / MARC / Lint.pm

package MARC::Lint;

use strict;
use warnings;
use integer;
use MARC::Record;
use MARC::Field;

use MARC::Lint::CodeData qw(%GeogAreaCodes %ObsoleteGeogAreaCodes %LanguageCodes %ObsoleteLanguageCodes);

our $VERSION = 1.46;

=head1 NAME

MARC::Lint - Perl extension for checking validity of MARC records

=head1 SYNOPSIS

    use MARC::File::USMARC;
    use MARC::Lint;

    my $lint = new MARC::Lint;
    my $filename = shift;

    my $file = MARC::File::USMARC->in( $filename );
    while ( my $marc = $file->next() ) {
        $lint->check_record( $marc );

        # Print the title tag
        print $marc->title, "\n";

        # Print the errors that were found
        print join( "\n", $lint->warnings ), "\n";
    } # while

Given the following MARC record:

    LDR 00000nam  22002538a 4500
    100 14 _aWall, Larry.
    110 1  _aO'Reilly & Associates.
    245 90 _aProgramming Perl /
           _aBig Book of Perl /
           _cLarry Wall, Tom Christiansen & Jon Orwant.
    250    _a3rd ed.
    250    _a3rd ed.
    260    _aCambridge, Mass. :
           _bO'Reilly,
           _r2000.
    590 4  _aPersonally signed by Larry.
    856 43 _uhttp://www.perl.com/

the following errors are generated:

    1XX: Only one 1XX tag is allowed, but I found 2 of them.
    100: Indicator 2 must be blank but it's "4"
    245: Indicator 1 must be 0 or 1 but it's "9"
    245: Subfield _a is not repeatable.
    250: Field is not repeatable.
    260: Subfield _r is not allowed.
    856: Indicator 2 must be blank, 0, 1, 2 or 8 but it's "3"

=head1 DESCRIPTION

Module for checking validity of MARC records.  99% of the users will want to do
something like is shown in the synopsis.  The other intrepid 1% will overload the
C<MARC::Lint> module's methods and provide their own special field-level checking.

What this means is that if you have certain requirements, such as making sure that
all 952 tags have a certain call number in them, you can write a function that
checks for that, and still get all the benefits of the MARC::Lint framework.

=head1 EXPORT

None.  Everything is done through objects.

=head1 METHODS

=head2 new()

No parms needed.  The C<MARC::Lint> object is little more than a list of warnings
and a bunch of rules.

=cut

sub new {
    my $class = shift;

    my $self = {
        _warnings => [],
    };
    bless $self, $class;

    $self->_read_rules();

    return $self;
}

=head2 warnings()

Returns a list of warnings found by C<check_record()> and its brethren.

=cut

sub warnings {
        my $self = shift;

        return wantarray ? @{$self->{_warnings}} : scalar @{$self->{_warnings}};
}

=head2 clear_warnings()

Clear the list of warnings for this linter object.  It's automatically called
when you call C<check_record()>.

=cut

sub clear_warnings {
    my $self = shift;

    $self->{_warnings} = [];
}

=head2 warn( $str [, $str...] )

Create a warning message, built from strings passed, like a C<print>
statement.

Typically, you'll leave this to C<check_record()>, but industrious
programmers may want to do their own checking as well.

=cut

sub warn {
    my $self = shift;

    push( @{$self->{_warnings}}, join( "", @_ ) );

    return;
}

=head2 check_record( $marc )

Does all sorts of lint-like checks on the MARC record I<$marc>,
both on the record as a whole, and on the individual fields &
subfields.

=cut

sub check_record {
    my $self = shift;
    my $marc = shift;

    $self->clear_warnings();

    ( (ref $marc) && $marc->isa('MARC::Record') )
        or return $self->warn( "Must pass a MARC::Record object to check_record" );

    my @_1xx = $marc->field( "1.." );
    my $n1xx = scalar @_1xx;
    if ( $n1xx > 1 ) {
        $self->warn( "1XX: Only one 1XX tag is allowed, but I found $n1xx of them." );
    }

    if ( not $marc->field( 245 ) ) {
        $self->warn( "245: No 245 tag." );
    }


    my %field_seen;
    my $rules = $self->{_rules};
    for my $field ( $marc->fields ) {
        my $tagno = $field->tag;

        my $tagrules = '';
        #if 880 field, inherit rules from tagno in subfield _6
        my $is_880 = 0;
        if ($tagno eq '880') {
            $is_880 = 1;
            if ($field->subfield('6')) {
                my $sub6 = $field->subfield('6');
                $tagno = substr($sub6, 0, 3);

                $tagrules = $rules->{$tagno} or next;
                #880 is repeatable, but its linked field may not be
                if ( ($tagrules->{'repeatable'} && ( $tagrules->{'repeatable'} eq 'NR' )) && $field_seen{'880.'.$tagno} ) {
                    $self->warn( "$tagno: Field is not repeatable." );
                } #if repeatability
            } #if subfield 6 present
            else {
                $self->warn( "880: No subfield 6." );
            } #else no subfield 6 in 880 field
        } #if this is 880 field
        else {
            $tagrules = $rules->{$tagno} or next;

            if ( ($tagrules->{'repeatable'} && ( $tagrules->{'repeatable'} eq 'NR' )) && $field_seen{$tagno} ) {
                $self->warn( "$tagno: Field is not repeatable." );
            } #if repeatability
        } #else not 880

        if ( $tagno >= 10 ) {
            for my $ind ( 1..2 ) {
                my $indvalue = $field->indicator($ind);
                if ( not ($indvalue =~ $tagrules->{"ind$ind" . "_regex"}) ) {
                    $self->warn(
                        "$tagno: Indicator $ind must be ",
                        $tagrules->{"ind$ind" . "_desc"},
                        " but it's \"$indvalue\""
                    );
                }
            } # for

            my %sub_seen;
            for my $subfield ( $field->subfields ) {
                my ($code,$data) = @$subfield;

                my $rule = $tagrules->{$code};
                if ( not defined $rule ) {
                    $self->warn( "$tagno: Subfield _$code is not allowed." );
                } elsif ( ($rule eq "NR") && $sub_seen{$code} ) {
                    $self->warn( "$tagno: Subfield _$code is not repeatable." );
                }

                if ( $data =~ /[\t\r\n]/ ) {
                    $self->warn( "$tagno: Subfield _$code has an invalid control character" );
                }

                ++$sub_seen{$code};
            } # for $subfields
        } # if $tagno >= 10

        elsif ($tagno < 10) {
            #check for subfield characters
            if ($field->data() =~ /\x1F/) {
                $self->warn( "$tagno: Subfields are not allowed in fields lower than 010" );
            } #if control field has subfield delimiter
        } #elsif $tagno < 10

        # Check to see if a check_xxx() function exists, and call it on the field if it does
        my $checker = "check_$tagno";
        if ( $self->can( $checker ) ) {
            $self->$checker( $field );
        }

        if ($is_880) {
            ++$field_seen{'880.'.$tagno};
        } #if 880 field
        else {
            ++$field_seen{$tagno};
        }
    } # for my $fields

    return;
}

=head2 check_I<xxx>( $field )

Various functions to check the different fields.  If the function doesn't exist,
then it doesn't get checked.

=head2 check_020()

Looks at 020$a and reports errors if the check digit is wrong.
Looks at 020$z and validates number if hyphens are present.

Uses Business::ISBN to do validation. Thirteen digit checking is currently done
with the internal sub _isbn13_check_digit(), based on code from Business::ISBN.

TO DO (check_020):

 Fix 13-digit ISBN checking.

=cut

sub check_020 {


    use Business::ISBN;

    my $self = shift;
    my $field = shift;

###################################################

# break subfields into code-data array and validate data

    my @subfields = $field->subfields();

    while (my $subfield = pop(@subfields)) {
        my ($code, $data) = @$subfield;
        my $isbnno = $data;
        #remove any hyphens
        $isbnno =~ s/\-//g;
        #remove nondigits
        $isbnno =~ s/^\D*(\d{9,12}[X\d])\b.*$/$1/;

        #report error if this is subfield 'a' 
        #and the first 10 or 13 characters are not a match for $isbnno
        if ($code eq 'a') { 
            if ((substr($data,0,length($isbnno)) ne $isbnno)) {
                $self->warn( "020: Subfield a may have invalid characters.");
            } #if first characters don't match

            #report error if no space precedes a qualifier in subfield a
            if ($data =~ /\(/) {
                $self->warn( "020: Subfield a qualifier must be preceded by space, $data.") unless ($data =~ /[X0-9] \(/);
            } #if data has parenthetical qualifier

            #report error if unable to find 10-13 digit string of digits in subfield 'a'
            if (($isbnno !~ /(?:^\d{10}$)|(?:^\d{13}$)|(?:^\d{9}X$)/)) {
                $self->warn( "020: Subfield a has the wrong number of digits, $data."); 
            } # if subfield 'a' but not 10 or 13 digit isbn
            #otherwise, check 10 and 13 digit checksums for validity
            else {
                if ((length ($isbnno) == 10)) {

                    if ($Business::ISBN::VERSION gt '2.02_01') {
                        $self->warn( "020: Subfield a has bad checksum, $data." ) if (Business::ISBN::valid_isbn_checksum($isbnno) != 1); 
                    } #if Business::ISBN version higher than 2.02_01
                    elsif ($Business::ISBN::VERSION lt '2') {
                        $self->warn( "020: Subfield a has bad checksum, $data." ) if (Business::ISBN::is_valid_checksum($isbnno) != 1); 
                    } #elsif Business::ISBN version lower than 2
                    else {
                        $self->warn( "Business::ISBN version must be below 2 or above 2.02_02." );
                    } #else Business::ISBN version between 2 and 2.02_02
                } #if 10 digit ISBN has invalid check digit
                # do validation check for 13 digit isbn
#########################################
### Not yet fully implemented ###########
#########################################
                elsif (length($isbnno) == 13){
                    #change line below once Business::ISBN handles 13-digit ISBNs
                    my $is_valid_13 = _isbn13_check_digit($isbnno);
                    $self->warn( "020: Subfield a has bad checksum (13 digit), $data.") unless ($is_valid_13 == 1); 
                } #elsif 13 digit ISBN has invalid check digit
###################################################
            } #else subfield 'a' has 10 or 13 digits
        } #if subfield 'a'
        #look for valid isbn in 020$z
        elsif ($code eq 'z') {
            if (($data =~ /^ISBN/) || ($data =~ /^\d*\-\d+/)){
##################################################
## Turned on for now--Comment to unimplement ####
##################################################
                $self->warn( "020:  Subfield z is numerically valid.") if ((length ($isbnno) == 10) && (Business::ISBN::is_valid_checksum($isbnno) == 1)); 
            } #if 10 digit ISBN has invalid check digit
        } #elsif subfield 'z'

    } # while @subfields

} #check_020

=head2 _isbn13_check_digit($ean)

Internal sub to determine if 13-digit ISBN has a valid checksum. The code is
taken from Business::ISBN::as_ean. It is expected to be temporary until
Business::ISBN is updated to check 13-digit ISBNs itself.

=cut

sub _isbn13_check_digit { 

    my $ean = shift;
    #remove and store current check digit
    my $check_digit = chop($ean);

    #calculate valid checksum
    my $sum = 0;
    foreach my $index ( 0, 2, 4, 6, 8, 10 )
        {
        $sum +=     substr($ean, $index, 1);
        $sum += 3 * substr($ean, $index + 1, 1);
        }

    #take the next higher multiple of 10 and subtract the sum.
    #if $sum is 37, the next highest multiple of ten is 40. the
    #check digit would be 40 - 37 => 3.
    my $valid_check_digit = ( 10 * ( int( $sum / 10 ) + 1 ) - $sum ) % 10;

    return $check_digit == $valid_check_digit ? 1 : 0;

} # _isbn13_check_digit

#########################################

=head2 check_041( $field )

Warns if subfields are not evenly divisible by 3 unless second indicator is 7
(future implementation would ensure that each subfield is exactly 3 characters
unless ind2 is 7--since subfields are now repeatable. This is not implemented
here due to the large number of records needing to be corrected.). Validates
against the MARC Code List for Languages (L<http://www.loc.gov/marc/>) using the
MARC::Lint::CodeData data pack to MARC::Lint (%LanguageCodes,
%ObsoleteLanguageCodes).

=cut

sub check_041 {


    my $self = shift;
    my $field = shift;

    # break subfields into code-data array (so the entire field is in one array)

    my @subfields = $field->subfields();
    my @newsubfields = ();

    while (my $subfield = pop(@subfields)) {
        my ($code, $data) = @$subfield;
        unshift (@newsubfields, $code, $data);
    } # while

    #warn if length of each subfield is not divisible by 3 unless ind2 is 7
    unless ($field->indicator(2) eq '7') {
        for (my $index = 0; $index <=$#newsubfields; $index+=2) {
            if (length ($newsubfields[$index+1]) %3 != 0) {
                $self->warn( "041: Subfield _$newsubfields[$index] must be evenly divisible by 3 or exactly three characters if ind2 is not 7, ($newsubfields[$index+1])." );
            } #if field length not divisible evenly by 3
##############################################
# validation against code list data
## each subfield has a multiple of 3 chars
# need to look at each group of 3 characters
            else {

                #break each character of the subfield into an array position
                my @codechars = split '', $newsubfields[$index+1];

                my $pos = 0;
                #store each 3 char code in a slot of @codes041
                my @codes041 = ();
                while ($pos <= $#codechars) {
                    push @codes041, (join '', @codechars[$pos..$pos+2]);
                    $pos += 3;
                }


                foreach my $code041 (@codes041) {
                    #see if language code matches valid code
                    my $validlang = 1 if ($LanguageCodes{$code041});
                    #look for invalid code match if valid code was not matched
                    my $obsoletelang = 1 if ($ObsoleteLanguageCodes{$code041});

                    # skip valid subfields
                    unless ($validlang) {
#report invalid matches as possible obsolete codes
                        if ($obsoletelang) {
                            $self->warn( "041: Subfield _$newsubfields[$index], $newsubfields[$index+1], may be obsolete.");
                        }
                        else {
                            $self->warn( "041: Subfield _$newsubfields[$index], $newsubfields[$index+1] ($code041), is not valid.");
                        } #else code not found 
                    } # unless found valid code
                } #foreach code in 041
            } # else subfield has multiple of 3 chars
##############################################
        } # foreach subfield
    } #unless ind2 is 7
} #check_041

=head2 check_043( $field )

Warns if each subfield a is not exactly 7 characters. Validates each code
against the MARC code list for Geographic Areas (L<http://www.loc.gov/marc/>)
using the MARC::Lint::CodeData data pack to MARC::Lint (%GeogAreaCodes,
%ObsoleteGeogAreaCodes).

=cut

sub check_043 {

    my $self = shift;
    my $field = shift;

    # break subfields into code-data array (so the entire field is in one array)

    my @subfields = $field->subfields();
    my @newsubfields = ();

    while (my $subfield = pop(@subfields)) {
        my ($code, $data) = @$subfield;
        unshift (@newsubfields, $code, $data);
    } # while

    #warn if length of subfield a is not exactly 7
    for (my $index = 0; $index <=$#newsubfields; $index+=2) {
        if (($newsubfields[$index] eq 'a') && (length ($newsubfields[$index+1]) != 7)) {
            $self->warn( "043: Subfield _a must be exactly 7 characters, $newsubfields[$index+1]" );
        } # if suba and length is not 7
        #check against code list for geographic areas.
        elsif ($newsubfields[$index] eq 'a') {

            #see if geog area code matches valid code
            my $validgac = 1 if ($GeogAreaCodes{$newsubfields[$index+1]});
            #look for obsolete code match if valid code was not matched
            my $obsoletegac = 1 if ($ObsoleteGeogAreaCodes{$newsubfields[$index+1]});

            # skip valid subfields
            unless ($validgac) {
                #report invalid matches as possible obsolete codes
                if ($obsoletegac) {
                    $self->warn( "043: Subfield _a, $newsubfields[$index+1], may be obsolete.");
                }
                else {
                    $self->warn( "043: Subfield _a, $newsubfields[$index+1], is not valid.");
                } #else code not found 
            } # unless found valid code

        } #elsif suba
    } #foreach subfield
} #check_043

=head2 check_245( $field )

 -Makes sure $a exists (and is first subfield).
 -Warns if last character of field is not a period
 --Follows LCRI 1.0C, Nov. 2003 rather than MARC21 rule
 -Verifies that $c is preceded by / (space-/)
 -Verifies that initials in $c are not spaced
 -Verifies that $b is preceded by :;= (space-colon, space-semicolon, space-equals)
 -Verifies that $h is not preceded by space unless it is dash-space
 -Verifies that data of $h is enclosed in square brackets
 -Verifies that $n is preceded by . (period)
  --As part of that, looks for no-space period, or dash-space-period (for replaced elipses)
 -Verifies that $p is preceded by , (no-space-comma) when following $n and . (period) when following other subfields.
 -Performs rudimentary article check of 245 2nd indicator vs. 1st word of 245$a (for manual verification).

 Article checking is done by internal _check_article method, which should work for 130, 240, 245, 440, 630, 730, and 830.

=cut

sub check_245 {

    my $self = shift;
    my $field = shift;

    #set tagno for reporting
    my $tagno = '245';
    
    if ( not $field->subfield( "a" ) ) {
        $self->warn( "245: Must have a subfield _a." );
    }

    # break subfields into code-data array (so the entire field is in one array)

    my @subfields = $field->subfields();
    my @newsubfields = ();
    my $has_sub_6 = 0;

    while (my $subfield = pop(@subfields)) {
        my ($code, $data) = @$subfield;
        #check for subfield 6 being present
        $has_sub_6 = 1 if ($code eq '6');
        unshift (@newsubfields, $code, $data);
    } # while
    
    # 245 must end in period (may want to make this less restrictive by allowing trailing spaces)
    #do 2 checks--for final punctuation (MARC21 rule), and for period (LCRI 1.0C, Nov. 2003)
    if ($newsubfields[$#newsubfields] !~ /[.?!]$/) {
        $self->warn ( "245: Must end with . (period).");
    }
    elsif($newsubfields[$#newsubfields] =~ /[?!]$/) {
        $self->warn ( "245: MARC21 allows ? or ! as final punctuation but LCRI 1.0C, Nov. 2003, requires period.");
    }

    ##Check for first subfield
    #subfield a should be first subfield (or 2nd if subfield '6' is present)
    if ($has_sub_6) {
        #make sure there are at least 2 subfields
        if ($#newsubfields < 3) {
            $self->warn ("$tagno: May have too few subfields.");
        } #if fewer than 2 subfields
        else {
            if ($newsubfields[0] ne '6') {
                $self->warn ( "$tagno: First subfield must be _6, but it is $newsubfields[0]");
            } #if 1st subfield not '6'
            if ($newsubfields[2] ne 'a') {
                $self->warn ( "$tagno: First subfield after subfield _6 must be _a, but it is _$newsubfields[2]");
            } #if 2nd subfield not 'a'
        } #else at least 2 subfields
    } #if has subfield 6
    else {
        #1st subfield must be 'a'
        if ($newsubfields[0] ne 'a') {
            $self->warn ( "$tagno: First subfield must be _a, but it is _$newsubfields[0]");
        } #if 2nd subfield not 'a'
    } #else no subfield _6
    ##End check for first subfield
    
    #subfield c, if present, must be preceded by /
    #also look for space between initials
    if ($field->subfield("c")) {
    
        for (my $index = 2; $index <=$#newsubfields; $index+=2) {
# 245 subfield c must be preceded by / (space-/)
            if ($newsubfields[$index] eq 'c') { 
                $self->warn ( "245: Subfield _c must be preceded by /") if ($newsubfields[$index-1] !~ /\s\/$/);
                # 245 subfield c initials should not have space
                $self->warn ( "245: Subfield _c initials should not have a space.") if (($newsubfields[$index+1] =~ /\b\w\. \b\w\./) && ($newsubfields[$index+1] !~ /\[\bi\.e\. \b\w\..*\]/));
                last;
            } #if
        } #for
    } # subfield c exists

    #each subfield b, if present, should be preceded by :;= (colon, semicolon, or equals sign)
    ### Are there others? ###
    if ($field->subfield("b")) {

        # 245 subfield b should be preceded by space-:;= (colon, semicolon, or equals sign)
        for (my $index = 2; $index <=$#newsubfields; $index+=2) {
#report error if subfield 'b' is not preceded by space-:;= (colon, semicolon, or equals sign)
            if (($newsubfields[$index] eq 'b') && ($newsubfields[$index-1] !~ / [:;=]$/)) {
                $self->warn ( "245: Subfield _b should be preceded by space-colon, space-semicolon, or space-equals sign.");
            } #if
        } #for
    } # subfield b exists


    #each subfield h, if present, should be preceded by non-space
    if ($field->subfield("h")) {

        # 245 subfield h should not be preceded by space
        for (my $index = 2; $index <=$#newsubfields; $index+=2) {
            #report error if subfield 'h' is preceded by space (unless dash-space)
            if (($newsubfields[$index] eq 'h') && ($newsubfields[$index-1] !~ /(\S$)|(\-\- $)/)) {
                $self->warn ( "245: Subfield _h should not be preceded by space.");
            } #if h and not preceded by no-space (unless dash)
            #report error if subfield 'h' does not start with open square bracket with a matching close bracket
            ##could have check against list of valid values here
            if (($newsubfields[$index] eq 'h') && ($newsubfields[$index+1] !~ /^\[\w*\s*\w*\]/)) {
                $self->warn ( "245: Subfield _h must have matching square brackets, $newsubfields[$index].");
            }
        } #for
    } # subfield h exists

    #each subfield n, if present, must be preceded by . (period)
    if ($field->subfield("n")) {

        # 245 subfield n must be preceded by . (period)
        for (my $index = 2; $index <=$#newsubfields; $index+=2) {
            #report error if subfield 'n' is not preceded by non-space-period or dash-space-period
            if (($newsubfields[$index] eq 'n') && ($newsubfields[$index-1] !~ /(\S\.$)|(\-\- \.$)/)) {
                $self->warn ( "245: Subfield _n must be preceded by . (period).");
            } #if
        } #for
    } # subfield n exists

    #each subfield p, if present, must be preceded by a , (no-space-comma) if it follows subfield n, or by . (no-space-period or dash-space-period) following other subfields
    if ($field->subfield("p")) {

        # 245 subfield p must be preceded by . (period) or , (comma)
        for (my $index = 2; $index <=$#newsubfields; $index+=2) {
#only looking for subfield p
            if ($newsubfields[$index] eq 'p') {
# case for subfield 'n' being field before this one (allows dash-space-comma)
                if (($newsubfields[$index-2] eq 'n') && ($newsubfields[$index-1] !~ /(\S,$)|(\-\- ,$)/)) {
                    $self->warn ( "245: Subfield _p must be preceded by , (comma) when it follows subfield _n.");
                } #if subfield n precedes this one
                # elsif case for subfield before this one is not n
                elsif (($newsubfields[$index-2] ne 'n') && ($newsubfields[$index-1] !~ /(\S\.$)|(\-\- \.$)/)) {
                    $self->warn ( "245: Subfield _p must be preceded by . (period) when it follows a subfield other than _n.");
                } #elsif subfield p preceded by non-period when following a non-subfield 'n'
            } #if index is looking at subfield p
        } #for
    } # subfield p exists

######################################
#check for invalid 2nd indicator
$self->_check_article($field);

} # check_245




############
# Internal #
############

=head2 _check_article

Check of articles is based on code from Ian Hamilton. This version is more
limited in that it focuses on English, Spanish, French, Italian and German
articles. Certain possible articles have been removed if they are valid English
non-articles. This version also disregards 008_language/041 codes and just uses
the list of articles to provide warnings/suggestions.

source for articles = L<http://www.loc.gov/marc/bibliographic/bdapp-e.html>

Should work with fields 130, 240, 245, 440, 630, 730, and 830. Reports error if
another field is passed in.

=cut

sub _check_article {

    my $self = shift;
    my $field = shift;

#add articles here as needed
##Some omitted due to similarity with valid words (e.g. the German 'die').
    my %article = (
        'a' => 'eng glg hun por',
        'an' => 'eng',
        'das' => 'ger',
        'dem' => 'ger',
        'der' => 'ger',
        'ein' => 'ger',
        'eine' => 'ger',
        'einem' => 'ger',
        'einen' => 'ger',
        'einer' => 'ger',
        'eines' => 'ger',
        'el' => 'spa',
        'en' => 'cat dan nor swe',
        'gl' => 'ita',
        'gli' => 'ita',
        'il' => 'ita mlt',
        'l' => 'cat fre ita mlt',
        'la' => 'cat fre ita spa',
        'las' => 'spa',
        'le' => 'fre ita',
        'les' => 'cat fre',
        'lo' => 'ita spa',
        'los' => 'spa',
        'os' => 'por',
        'the' => 'eng',
        'um' => 'por',
        'uma' => 'por',
        'un' => 'cat spa fre ita',
        'una' => 'cat spa ita',
        'une' => 'fre',
        'uno' => 'ita',
    );

#add exceptions here as needed
# may want to make keys lowercase
    my %exceptions = (
        'A & E' => 1,
        'A & ' => 1,
        'A-' => 1,
        'A+' => 1,
        'A is ' => 1,
        'A isn\'t ' => 1,
        'A l\'' => 1,
        'A la ' => 1,
        'A posteriori' => 1,
        'A priori' => 1,
        'A to ' => 1,
        'El Nino' => 1,
        'El Salvador' => 1,
        'L is ' => 1,
        'L-' => 1,
        'La Salle' => 1,
        'Las Vegas' => 1,
        'Lo mein' => 1,
        'Los Alamos' => 1,
        'Los Angeles' => 1,
    );

    #get tagno to determine which indicator to check and for reporting
    my $tagno = $field->tag();
    #retrieve tagno from subfield 6 if 880 field
    if ($tagno eq '880') {
        if ($field->subfield('6')) {
            my $sub6 = $field->subfield('6');
            $tagno = substr($sub6, 0, 3);
        } #if subfield 6
    } #if 880 field

    #$ind holds nonfiling character indicator value
    my $ind = '';
    #$first_or_second holds which indicator is for nonfiling char value 
    my $first_or_second = '';
    if ($tagno !~ /^(?:130|240|245|440|630|730|830)$/) {
        print $tagno, " is not a valid field for article checking\n";
        return;
    } #if field is not one of those checked for articles
    #130, 630, 730 => ind1
    elsif ($tagno =~ /^(?:130|630|730)$/) {
        $ind = $field->indicator(1);
        $first_or_second = '1st';
    } #if field is 130, 630, or 730
    #240, 245, 440, 830 => ind2
    elsif ($tagno =~ /^(?:240|245|440|830)$/) {
        $ind = $field->indicator(2);
        $first_or_second = '2nd';
    } #if field is 240, 245, 440, or 830


    #report non-numeric non-filing indicators as invalid
    $self->warn ( $tagno, ": Non-filing indicator is non-numeric" ) unless ($ind =~ /^[0-9]$/);
    #get subfield 'a' of the title field
    my $title = $field->subfield('a') || '';


    my $char1_notalphanum = 0;
    #check for apostrophe, quote, bracket,  or parenthesis, before first word
    #remove if found and add to non-word counter
    while ($title =~ /^["'\[\(*]/){
        $char1_notalphanum++;
        $title =~ s/^["'\[\(*]//;
    }
    # split title into first word + rest on space, parens, bracket, apostrophe, quote, or hyphen
    my ($firstword, $separator, $etc) = $title =~ /^([^ \(\)\[\]'"\-]+)([ \(\)\[\]'"\-])?(.*)/i;
        $firstword = '' if ! defined( $firstword );
        $separator = '' if ! defined( $separator );
        $etc = '' if ! defined( $etc );

    #get length of first word plus the number of chars removed above plus one for the separator
    my $nonfilingchars = length($firstword) + $char1_notalphanum + 1;

    #check to see if first word is an exception
    my $isan_exception = 0;
    $isan_exception = grep {$title =~ /^\Q$_\E/i} (keys %exceptions);

    #lowercase chars of $firstword for comparison with article list
    $firstword = lc($firstword);

    my $isan_article = 0;

    #see if first word is in the list of articles and not an exception
    $isan_article = 1 if (($article{$firstword}) && !($isan_exception));

    #if article then $nonfilingchars should match $ind
    if ($isan_article) {
        #account for quotes, apostrophes, parens, or brackets before 2nd word
#        if (($separator eq ' ') && ($etc =~ /^['"]/)) {
        if (($separator) && ($etc =~ /^[ \(\)\[\]'"\-]+/)) {
            while ($etc =~ /^[ "'\[\]\(\)*]/){
                $nonfilingchars++;
                $etc =~ s/^[ "'\[\]\(\)*]//;
            } #while etc starts with nonfiling chars
        } #if separator defined and etc starts with nonfiling chars
        #special case for 'en' (unsure why)
        if ($firstword eq 'en') {
            $self->warn ( $tagno, ": First word, , $firstword, may be an article, check $first_or_second indicator ($ind)." ) unless (($ind eq '3') || ($ind eq '0'));
        }
        elsif ($nonfilingchars ne $ind) {
            $self->warn ( $tagno, ": First word, $firstword, may be an article, check $first_or_second indicator ($ind)." );
        } #unless ind is same as length of first word and nonfiling characters
    } #if first word is in article list
    #not an article so warn if $ind is not 0
    else {
        unless ($ind eq '0') {
            $self->warn ( $tagno, ": First word, $firstword, does not appear to be an article, check $first_or_second indicator ($ind)." );
        } #unless ind is 0
    } #else not in article list

#######################################

} #_check_article


############

=head1 SEE ALSO

Check the docs for L<MARC::Record>.  All software links are there.

=head1 TODO

=over 4

=item * Subfield 6

For subfield 6, it should always be the 1st subfield according to MARC 21 specifications. Perhaps a generic check should be added that warns if subfield 6 is not the 1st subfield.

=item * Subfield 8.

This subfield could be the 1st or 2nd subfield, so the code that checks for the 1st few subfields (check_245, check_250) should take that into account.

=item * Subfield 9

This subfield is not officially allowed in MARC, since it is locally defined. Some way needs to be made to allow messages/warnings about this subfield to be turned off (or otherwise deal with records using/allowing locally defined subfield 9).

=item * 008 length and presence check

Currently, 008 validation is not implemented in MARC::Lint, but is left to MARC::Errorchecks. It might be useful if MARC::Lint's basic validation checks included a verification that the 008 exists and is exactly 40 characters long. Additional 008-related checking and byte validation would remain in MARC::Errorchecks.

=item * ISBN and ISSN checking

020 and 022 fields are validated with the C<Business::ISBN> and
C<Business::ISSN> modules, respectively. Business::ISBN versions between 2 and
2.02_01 are incompatible with MARC::Lint.

=item * check_041 cleanup

Splitting subfield code strings every 3 chars could probably be written more efficiently.

=item * check_245 cleanup

The article checking in particular.

=item * Method for turning off checks

Provide a way for users to skip checks more easily when using check_record, or a
specific check_xxx method (e.g. skip article checking).

=back

=head1 LICENSE

This code may be distributed under the same terms as Perl itself.

Please note that these modules are not products of or supported by the
employers of the various contributors to the code.

=cut

# Used only to read the stuff from __DATA__
sub _read_rules {
    my $self = shift;

    my $tell = tell(DATA);  # Stash the position so we can reset it for next time

    local $/ = "";
    while ( my $tagblock = <DATA> ) {
        my @lines = split( /\n/, $tagblock );
        s/\s+$// for @lines;

        next unless @lines >= 4; # Some of our entries are tag-only

        my $tagline = shift @lines;
        my @keyvals = split( /\s+/, $tagline, 3 );
        my $tagno = shift @keyvals;
        my $repeatable = shift @keyvals;

        $self->_parse_tag_rules( $tagno, $repeatable, @lines );
    } # while

    # Set the pointer back to where it was, in case we do this again
    seek( DATA, $tell, 0 );
}

sub _parse_tag_rules {
    my $self = shift;
    my $tagno = shift;
    my $repeatable = shift;
    my @lines = @_;

    my $rules = ($self->{_rules}->{$tagno} ||= {});
    $rules->{'repeatable'} = $repeatable;

    for my $line ( @lines ) {
        my @keyvals = split( /\s+/, $line, 3 );
        my $key = shift @keyvals;
        my $val = shift @keyvals;

        # Do magic for indicators
        if ( $key =~ /^ind/ ) {
            $rules->{$key} = $val;

            my $desc;
            my $regex;

            if ( $val eq "blank" ) {
                $desc = "blank";
                $regex = qr/^ $/;
            } else {
                $desc = _nice_list($val);
                $val =~ s/^b/ /;
                $regex = qr/^[$val]$/;
            }

            $rules->{$key."_desc"} = $desc;
            $rules->{$key."_regex"} = $regex;
        } # if indicator
        else {
            if ( $key =~ /(.)-(.)/ ) {
                my ($min,$max) = ($1,$2);
                $rules->{$_} = $val for ($min..$max);
            } else {
                $rules->{$key} = $val;
            }
        } # not an indicator
    } # for $line
}


sub _nice_list {
    my $str = shift;

    if ( $str =~ s/(\d)-(\d)/$1 thru $2/ ) {
        return $str;
    }

    my @digits = split( //, $str );
    $digits[0] = "blank" if $digits[0] eq "b";
    my $last = pop @digits;
    return join( ", ", @digits ) . " or $last";
}

sub _ind_regex {
    my $str = shift;

    return qr/^ $/ if $str eq "blank";

    return qr/^[$str]$/;
}


1;

__DATA__
001     NR      CONTROL NUMBER
ind1    blank   Undefined
ind2    blank   Undefined
        NR      Undefined

002     NR      LOCALLY DEFINED (UNOFFICIAL)
ind1    blank   Undefined
ind2    blank   Undefined
        NR      Undefined

003     NR      CONTROL NUMBER IDENTIFIER
ind1    blank   Undefined
ind2    blank   Undefined
        NR      Undefined

005     NR      DATE AND TIME OF LATEST TRANSACTION
ind1    blank   Undefined
ind2    blank   Undefined
        NR      Undefined

006     R       FIXED-LENGTH DATA ELEMENTS--ADDITIONAL MATERIAL CHARACTERISTICS--GENERAL INFORMATION
ind1    blank   Undefined
ind2    blank   Undefined
        R       Undefined

007     R       PHYSICAL DESCRIPTION FIXED FIELD--GENERAL INFORMATION
ind1    blank   Undefined
ind2    blank   Undefined
        R       Undefined

008     NR      FIXED-LENGTH DATA ELEMENTS--GENERAL INFORMATION
ind1    blank   Undefined
ind2    blank   Undefined
        NR      Undefined

010     NR      LIBRARY OF CONGRESS CONTROL NUMBER
ind1    blank   Undefined
ind2    blank   Undefined
a       NR      LC control number 
b       R       NUCMC control number 
z       R       Canceled/invalid LC control number 
8       R       Field link and sequence number 

013     R       PATENT CONTROL INFORMATION
ind1    blank   Undefined
ind2    blank   Undefined
a       NR      Number 
b       NR      Country 
c       NR      Type of number 
d       R       Date 
e       R       Status 
f       R       Party to document 
6       NR      Linkage 
8       R       Field link and sequence number 

015     R       NATIONAL BIBLIOGRAPHY NUMBER
ind1    blank   Undefined
ind2    blank   Undefined
a       R       National bibliography number 
z       R       Canceled/Invalid national bibliography number
2       NR      Source 
6       NR      Linkage 
8       R       Field link and sequence number 

016     R       NATIONAL BIBLIOGRAPHIC AGENCY CONTROL NUMBER
ind1    b7      National bibliographic agency
ind2    blank   Undefined
a       NR      Record control number 
z       R       Canceled or invalid record control number 
2       NR      Source 
8       R       Field link and sequence number 

017     R       COPYRIGHT OR LEGAL DEPOSIT NUMBER
ind1    blank   Undefined
ind2    b8      Undefined
a       R       Copyright or legal deposit number
b       NR      Assigning agency
d       NR      Date
i       NR      Display text
z       R       Canceled/invalid copyright or legal deposit number
2       NR      Source 
6       NR      Linkage 
8       R       Field link and sequence number 

018     NR      COPYRIGHT ARTICLE-FEE CODE
ind1    blank   Undefined
ind2    blank   Undefined
a       NR      Copyright article-fee code 
6       NR      Linkage 
8       R       Field link and sequence number 

020     R       INTERNATIONAL STANDARD BOOK NUMBER
ind1    blank   Undefined
ind2    blank   Undefined
a       NR      International Standard Book Number 
c       NR      Terms of availability 
z       R       Canceled/invalid ISBN 
6       NR      Linkage 
8       R       Field link and sequence number 

022     R       INTERNATIONAL STANDARD SERIAL NUMBER
ind1    b01     Level of international interest
ind2    blank   Undefined
a       NR      International Standard Serial Number 
l       NR      ISSN-L
m       R       Canceled ISSN-L
y       R       Incorrect ISSN 
z       R       Canceled ISSN 
2       NR      Source 
6       NR      Linkage 
8       R       Field link and sequence number 

024     R       OTHER STANDARD IDENTIFIER
ind1    0123478    Type of standard number or code
ind2    b01     Difference indicator
a       NR      Standard number or code 
c       NR      Terms of availability 
d       NR      Additional codes following the standard number or code 
z       R       Canceled/invalid standard number or code 
2       NR      Source of number or code 
6       NR      Linkage 
8       R       Field link and sequence number 

025     R       OVERSEAS ACQUISITION NUMBER
ind1    blank   Undefined
ind2    blank   Undefined
a       R       Overseas acquisition number 
8       R       Field link and sequence number 

026     R       FINGERPRINT IDENTIFIER
ind1    blank   Undefined
ind2    blank   Undefined
a       R       First and second groups of characters 
b       R       Third and fourth groups of characters 
c       NR      Date 
d       R       Number of volume or part 
e       NR      Unparsed fingerprint 
2       NR      Source 
5       R       Institution to which field applies 
6       NR      Linkage 
8       R       Field link and sequence number 

027     R       STANDARD TECHNICAL REPORT NUMBER
ind1    blank   Undefined
ind2    blank   Undefined
a       NR      Standard technical report number 
z       R       Canceled/invalid number 
6       NR      Linkage 
8       R       Field link and sequence number 

028     R       PUBLISHER NUMBER
ind1    012345  Type of publisher number
ind2    0123    Note/added entry controller
a       NR      Publisher number 
b       NR      Source 
6       NR      Linkage 
8       R       Field link and sequence number 

030     R       CODEN DESIGNATION
ind1    blank   Undefined
ind2    blank   Undefined
a       NR      CODEN 
z       R       Canceled/invalid CODEN 
6       NR      Linkage 
8       R       Field link and sequence number 

031     R       MUSICAL INCIPITS INFORMATION
ind1    blank   Undefined
ind2    blank   Undefined
a       NR      Number of work
b       NR      Number of movement
c       NR      Number of excerpt
d       R       Caption or heading
e       NR      Role
g       NR      Clef
m       NR      Voice/instrument
n       NR      Key signature
o       NR      Time signature
p       NR      Musical notation
q       R       General note
r       NR      Key or mode
s       R       Coded validity note
t       R       Text incipit
u       R       Uniform Resource Identifier
y       R       Link text
z       R       Public note
2       NR      System code
6       NR      Linkage
8       R       Field link and sequence number

032     R       POSTAL REGISTRATION NUMBER
ind1    blank   Undefined
ind2    blank   Undefined
a       NR      Postal registration number 
b       NR      Source (agency assigning number) 
6       NR      Linkage 
8       R       Field link and sequence number 

033     R       DATE/TIME AND PLACE OF AN EVENT
ind1    b012    Type of date in subfield $a
ind2    b012    Type of event
a       R       Formatted date/time 
b       R       Geographic classification area code 
c       R       Geographic classification subarea code 
p       R       Place of event
0       R       Record control number
2       R       Source of term
3       NR      Materials specified 
6       NR      Linkage 
8       R       Field link and sequence number 

034     R       CODED CARTOGRAPHIC MATHEMATICAL DATA
ind1    013     Type of scale
ind2    b01     Type of ring
a       NR      Category of scale 
b       R       Constant ratio linear horizontal scale 
c       R       Constant ratio linear vertical scale 
d       NR      Coordinates--westernmost longitude 
e       NR      Coordinates--easternmost longitude 
f       NR      Coordinates--northernmost latitude 
g       NR      Coordinates--southernmost latitude 
h       R       Angular scale 
j       NR      Declination--northern limit 
k       NR      Declination--southern limit 
m       NR      Right ascension--eastern limit 
n       NR      Right ascension--western limit 
p       NR      Equinox 
r       NR      Distance from earth
s       R       G-ring latitude 
t       R       G-ring longitude 
x       NR      Beginning date
y       NR      Ending date
z       NR      Name of extraterrestrial body
0       R       Authority record control number or standard number
2       NR      Source
3       NR      Materials specified
6       NR      Linkage 
8       R       Field link and sequence number 

035     R       SYSTEM CONTROL NUMBER
ind1    blank   Undefined
ind2    blank   Undefined
a       NR      System control number 
z       R       Canceled/invalid control number 
6       NR      Linkage 
8       R       Field link and sequence number 

036     NR      ORIGINAL STUDY NUMBER FOR COMPUTER DATA FILES
ind1    blank   Undefined
ind2    blank   Undefined
a       NR      Original study number 
b       NR      Source (agency assigning number) 
6       NR      Linkage 
8       R       Field link and sequence number 

037     R       SOURCE OF ACQUISITION
ind1    blank   Undefined
ind2    blank   Undefined
a       NR      Stock number 
b       NR      Source of stock number/acquisition 
c       R       Terms of availability 
f       R       Form of issue 
g       R       Additional format characteristics 
n       R       Note 
6       NR      Linkage 
8       R       Field link and sequence number 

038     NR      RECORD CONTENT LICENSOR
ind1    blank   Undefined
ind2    blank   Undefined
a       NR      Record content licensor 
6       NR      Linkage 
8       R       Field link and sequence number 

040     NR      CATALOGING SOURCE
ind1    blank   Undefined
ind2    blank   Undefined
a       NR      Original cataloging agency 
b       NR      Language of cataloging 
c       NR      Transcribing agency 
d       R       Modifying agency 
e       R       Description conventions 
6       NR      Linkage 
8       R       Field link and sequence number 

041     R       LANGUAGE CODE
ind1    b01      Translation indication
ind2    b7      Source of code
a       R       Language code of text/sound track or separate title 
b       R       Language code of summary or abstract
d       R       Language code of sung or spoken text 
e       R       Language code of librettos 
f       R       Language code of table of contents 
g       R       Language code of accompanying material other than librettos 
h       R       Language code of original
j       R       Language code of subtitles or captions
k       R       Language code of intermediate translations
m       R       Language code of original accompanying materials other than librettos
n       R       Language code of original libretto
2       NR      Source of code 
6       NR      Linkage 
8       R       Field link and sequence number 

042     NR      AUTHENTICATION CODE
ind1    blank   Undefined
ind2    blank   Undefined
a       R       Authentication code 

043     NR      GEOGRAPHIC AREA CODE
ind1    blank   Undefined
ind2    blank   Undefined
a       R       Geographic area code 
b       R       Local GAC code 
c       R       ISO code 
0       R       Authority record control number or standard number
2       R       Source of local code 
6       NR      Linkage 
8       R       Field link and sequence number 

044     NR      COUNTRY OF PUBLISHING/PRODUCING ENTITY CODE
ind1    blank   Undefined
ind2    blank   Undefined
a       R       MARC country code 
b       R       Local subentity code 
c       R       ISO country code 
2       R       Source of local subentity code 
6       NR      Linkage 
8       R       Field link and sequence number 

045     NR      TIME PERIOD OF CONTENT
ind1    b012    Type of time period in subfield $b or $c
ind2    blank   Undefined
a       R       Time period code 
b       R       Formatted 9999 B.C. through C.E. time period 
c       R       Formatted pre-9999 B.C. time period 
6       NR      Linkage 
8       R       Field link and sequence number 

046     R       SPECIAL CODED DATES
ind1    blank   Undefined
ind2    blank   Undefined
a       NR      Type of date code 
b       NR      Date 1 (B.C. date) 
c       NR      Date 1 (C.E. date) 
d       NR      Date 2 (B.C. date) 
e       NR      Date 2 (C.E. date) 
j       NR      Date resource modified 
k       NR      Beginning or single date created 
l       NR      Ending date created 
m       NR      Beginning of date valid 
n       NR      End of date valid 
2       NR      Source of date 
6       NR      Linkage 
8       R       Field link and sequence number 

047     R       FORM OF MUSICAL COMPOSITION CODE
ind1    blank   Undefined
ind2    b7      Source of code
a       R       Form of musical composition code 
2       NR      Source of code
8       R       Field link and sequence number 

048     R       NUMBER OF MUSICAL INSTRUMENTS OR VOICES CODE
ind1    blank   Undefined
ind2    b7      Source specified in subfield $2
a       R       Performer or ensemble 
b       R       Soloist 
2       NR      Source of code
8       R       Field link and sequence number

050     R       LIBRARY OF CONGRESS CALL NUMBER
ind1    b01     Existence in LC collection
ind2    04      Source of call number
a       R       Classification number 
b       NR      Item number 
3       NR      Materials specified 
6       NR      Linkage 
8       R       Field link and sequence number 

051     R       LIBRARY OF CONGRESS COPY, ISSUE, OFFPRINT STATEMENT
ind1    blank   Undefined
ind2    blank   Undefined
a       NR      Classification number 
b       NR      Item number 
c       NR      Copy information 
8       R       Field link and sequence number 

052     R       GEOGRAPHIC CLASSIFICATION
ind1    b17     Code source
ind2    blank   Undefined
a       NR      Geographic classification area code 
b       R       Geographic classification subarea code 
d       R       Populated place name 
2       NR      Code source 
6       NR      Linkage 
8       R       Field link and sequence number 

055     R       CLASSIFICATION NUMBERS ASSIGNED IN CANADA
ind1    b01     Existence in LAC collection
ind2    0123456789   Type, completeness, source of class/call number
a       NR      Classification number 
b       NR      Item number 
2       NR      Source of call/class number 
8       R       Field link and sequence number 

060     R       NATIONAL LIBRARY OF MEDICINE CALL NUMBER
ind1    b01     Existence in NLM collection
ind2    04      Source of call number
a       R       Classification number 
b       NR      Item number 
8       R       Field link and sequence number 

061     R       NATIONAL LIBRARY OF MEDICINE COPY STATEMENT
ind1    blank   Undefined
ind2    blank   Undefined
a       R       Classification number 
b       NR      Item number 
c       NR      Copy information 
8       R       Field link and sequence number 

066     NR      CHARACTER SETS PRESENT
ind1    blank   Undefined
ind2    blank   Undefined
a       NR      Primary G0 character set 
b       NR      Primary G1 character set 
c       R       Alternate G0 or G1 character set 

070     R       NATIONAL AGRICULTURAL LIBRARY CALL NUMBER
ind1    01      Existence in NAL collection
ind2    blank   Undefined
a       R       Classification number 
b       NR      Item number 
8       R       Field link and sequence number 

071     R       NATIONAL AGRICULTURAL LIBRARY COPY STATEMENT
ind1    blank   Undefined
ind2    blank   Undefined
a       R       Classification number 
b       NR      Item number 
c       NR      Copy information 
8       R       Field link and sequence number 

072     R       SUBJECT CATEGORY CODE
ind1    blank   Undefined
ind2    07      Source specified in subfield $2
a       NR      Subject category code 
x       R       Subject category code subdivision 
2       NR      Source 
6       NR      Linkage 
8       R       Field link and sequence number 

074     R       GPO ITEM NUMBER
ind1    blank   Undefined
ind2    blank   Undefined
a       NR      GPO item number 
z       R       Canceled/invalid GPO item number 
8       R       Field link and sequence number 

080     R       UNIVERSAL DECIMAL CLASSIFICATION NUMBER
ind1    01      Type of edition
ind2    blank   Undefined
a       NR      Universal Decimal Classification number 
b       NR      Item number 
x       R       Common auxiliary subdivision 
2       NR      Edition identifier 
6       NR      Linkage 
8       R       Field link and sequence number 

082     R       DEWEY DECIMAL CLASSIFICATION NUMBER
ind1    017     Type of edition
ind2    b04     Source of classification number
a       R       Classification number 
b       NR      Item number 
m       NR      Standard or optional designation
q       NR      Assigning agency
2       NR      Edition number 
6       NR      Linkage 
8       R       Field link and sequence number 

083     R       ADDITIONAL DEWEY DECIMAL CLASSIFICATION NUMBER
ind1    017     Type of edition
ind2    blank   Undefined
a       R       Classification number
c       R       Classification number--Ending number of span
m       NR      Standard or optional designation
q       NR      Assigning agency
y       R       Table sequence number for internal subarrangement or add table
z       R       Table identification
2       NR      Edition number
6       NR      Linkage
8       R       Field link and sequence number

084     R       OTHER CLASSIFICATION NUMBER
ind1    blank   Undefined
ind2    blank   Undefined
a       R       Classification number 
b       NR      Item number 
q       NR      Assigning agency
2       NR      Source of number 
6       NR      Linkage 
8       R       Field link and sequence number 

085     R       SYNTHESIZED CLASSIFICATION NUMBER COMPONENTS
ind1    blank   Undefined
ind2    blank   Undefined
a       R       Number where instructions are found-single number or beginning number of span
b       R       Base number
c       R       Classification number-ending number of span
f       R       Facet designator
r       R       Root number
s       R       Digits added from classification number in schedule or external table
t       R       Digits added from internal subarrangement or add table
u       R       Number being analyzed
v       R       Number in internal subarrangement or add table where instructions are found
w       R       Table identification-Internal subarrangement or add table
y       R       Table sequence number for internal subarrangement or add table
z       R       Table identification
6       NR      Linkage
8       R       Field link and sequence number

086     R       GOVERNMENT DOCUMENT CLASSIFICATION NUMBER
ind1    b01     Number source
ind2    blank   Undefined
a       NR      Classification number 
z       R       Canceled/invalid classification number 
2       NR      Number source 
6       NR      Linkage 
8       R       Field link and sequence number 

088     R       REPORT NUMBER
ind1    blank   Undefined
ind2    blank   Undefined
a       NR      Report number 
z       R       Canceled/invalid report number 
6       NR      Linkage 
8       R       Field link and sequence number 

100     NR      MAIN ENTRY--PERSONAL NAME
ind1    013     Type of personal name entry element
ind2    blank   Undefined
a       NR      Personal name 
b       NR      Numeration 
c       R       Titles and other words associated with a name 
d       NR      Dates associated with a name 
e       R       Relator term 
f       NR      Date of a work 
g       NR      Miscellaneous information 
j       R       Attribution qualifier 
k       R       Form subheading 
l       NR      Language of a work 
n       R       Number of part/section of a work 
p       R       Name of part/section of a work 
q       NR      Fuller form of name 
t       NR      Title of a work 
u       NR      Affiliation 
0       R       Authority record control number
4       R       Relator code 
6       NR      Linkage 
8       R       Field link and sequence number 

110     NR      MAIN ENTRY--CORPORATE NAME
ind1    012     Type of corporate name entry element
ind2    blank   Undefined
a       NR      Corporate name or jurisdiction name as entry element 
b       R       Subordinate unit 
c       NR      Location of meeting 
d       R       Date of meeting or treaty signing 
e       R       Relator term 
f       NR      Date of a work 
g       NR      Miscellaneous information 
k       R       Form subheading 
l       NR      Language of a work 
n       R       Number of part/section/meeting 
p       R       Name of part/section of a work 
t       NR      Title of a work 
u       NR      Affiliation 
0       R       Authority record control number
4       R       Relator code 
6       NR      Linkage 
8       R       Field link and sequence number 

111     NR      MAIN ENTRY--MEETING NAME
ind1    012     Type of meeting name entry element
ind2    blank   Undefined
a       NR      Meeting name or jurisdiction name as entry element 
c       NR      Location of meeting 
d       NR      Date of meeting 
e       R       Subordinate unit 
f       NR      Date of a work 
g       NR      Miscellaneous information 
j       R       Relator term
k       R       Form subheading 
l       NR      Language of a work 
n       R       Number of part/section/meeting 
p       R       Name of part/section of a work 
q       NR      Name of meeting following jurisdiction name entry element 
t       NR      Title of a work 
u       NR      Affiliation 
0       R       Authority record control number
4       R       Relator code 
6       NR      Linkage 
8       R       Field link and sequence number 

130     NR      MAIN ENTRY--UNIFORM TITLE
ind1    0-9     Nonfiling characters
ind2    blank   Undefined
a       NR      Uniform title 
d       R       Date of treaty signing 
f       NR      Date of a work 
g       NR      Miscellaneous information 
h       NR      Medium 
k       R       Form subheading 
l       NR      Language of a work 
m       R       Medium of performance for music 
n       R       Number of part/section of a work 
o       NR      Arranged statement for music 
p       R       Name of part/section of a work 
r       NR      Key for music 
s       NR      Version 
t       NR      Title of a work 
0       R       Authority record control number
6       NR      Linkage 
8       R       Field link and sequence number 

210     R       ABBREVIATED TITLE
ind1    01      Title added entry
ind2    b0      Type
a       NR      Abbreviated title 
b       NR      Qualifying information 
2       R       Source 
6       NR      Linkage 
8       R       Field link and sequence number 

222     R       KEY TITLE
ind1    blank   Specifies whether variant title and/or added entry is required
ind2    0-9     Nonfiling characters
a       NR      Key title 
b       NR      Qualifying information 
6       NR      Linkage 
8       R       Field link and sequence number 

240     NR      UNIFORM TITLE
ind1    01    Uniform title printed or displayed
ind2    0-9    Nonfiling characters
a       NR      Uniform title 
d       R       Date of treaty signing 
f       NR      Date of a work 
g       NR      Miscellaneous information 
h       NR      Medium 
k       R       Form subheading 
l       NR      Language of a work 
m       R       Medium of performance for music 
n       R       Number of part/section of a work 
o       NR      Arranged statement for music 
p       R       Name of part/section of a work 
r       NR      Key for music 
s       NR      Version 
0       R       Authority record control number
6       NR      Linkage 
8       R       Field link and sequence number 

242     R       TRANSLATION OF TITLE BY CATALOGING AGENCY
ind1    01    Title added entry
ind2    0-9    Nonfiling characters
a       NR      Title 
b       NR      Remainder of title 
c       NR      Statement of responsibility, etc. 
h       NR      Medium 
n       R       Number of part/section of a work 
p       R       Name of part/section of a work 
y       NR      Language code of translated title 
6       NR      Linkage 
8       R       Field link and sequence number 

243     NR      COLLECTIVE UNIFORM TITLE
ind1    01    Uniform title printed or displayed
ind2    0-9    Nonfiling characters
a       NR      Uniform title 
d       R       Date of treaty signing 
f       NR      Date of a work 
g       NR      Miscellaneous information 
h       NR      Medium 
k       R       Form subheading 
l       NR      Language of a work 
m       R       Medium of performance for music 
n       R       Number of part/section of a work 
o       NR      Arranged statement for music 
p       R       Name of part/section of a work 
r       NR      Key for music 
s       NR      Version 
6       NR      Linkage 
8       R       Field link and sequence number 

245     NR      TITLE STATEMENT
ind1    01    Title added entry
ind2    0-9    Nonfiling characters
a       NR      Title 
b       NR      Remainder of title 
c       NR      Statement of responsibility, etc. 
f       NR      Inclusive dates 
g       NR      Bulk dates 
h       NR      Medium 
k       R       Form 
n       R       Number of part/section of a work 
p       R       Name of part/section of a work 
s       NR      Version 
6       NR      Linkage 
8       R       Field link and sequence number 

246     R       VARYING FORM OF TITLE
ind1    0123    Note/added entry controller
ind2    b012345678    Type of title
a       NR      Title proper/short title 
b       NR      Remainder of title 
f       NR      Date or sequential designation 
g       NR      Miscellaneous information 
h       NR      Medium 
i       NR      Display text 
n       R       Number of part/section of a work 
p       R       Name of part/section of a work 
5       NR      Institution to which field applies 
6       NR      Linkage 
8       R       Field link and sequence number 

247     R       FORMER TITLE
ind1    01      Title added entry
ind2    01      Note controller
a       NR      Title 
b       NR      Remainder of title 
f       NR      Date or sequential designation 
g       NR      Miscellaneous information 
h       NR      Medium 
n       R       Number of part/section of a work 
p       R       Name of part/section of a work 
x       NR      International Standard Serial Number 
6       NR      Linkage 
8       R       Field link and sequence number 

250     NR      EDITION STATEMENT
ind1    blank   Undefined
ind2    blank   Undefined
a       NR      Edition statement 
b       NR      Remainder of edition statement 
6       NR      Linkage 
8       R       Field link and sequence number 

254     NR      MUSICAL PRESENTATION STATEMENT
ind1    blank   Undefined
ind2    blank   Undefined
a       NR      Musical presentation statement 
6       NR      Linkage 
8       R       Field link and sequence number 

255     R       CARTOGRAPHIC MATHEMATICAL DATA
ind1    blank   Undefined
ind2    blank   Undefined
a       NR      Statement of scale 
b       NR      Statement of projection 
c       NR      Statement of coordinates 
d       NR      Statement of zone 
e       NR      Statement of equinox 
f       NR      Outer G-ring coordinate pairs 
g       NR      Exclusion G-ring coordinate pairs 
6       NR      Linkage 
8       R       Field link and sequence number 

256     NR      COMPUTER FILE CHARACTERISTICS
ind1    blank   Undefined
ind2    blank   Undefined
a       NR      Computer file characteristics 
6       NR      Linkage 
8       R       Field link and sequence number 

257     R       COUNTRY OF PRODUCING ENTITY
ind1    blank   Undefined
ind2    blank   Undefined
a       R       Country of producing entity
2       NR      Source
6       NR      Linkage 
8       R       Field link and sequence number 

258     R       PHILATELIC ISSUE DATE
ind1    blank   Undefined
ind2    blank   Undefined
a       NR      Issuing jurisdiction
b       NR      Denomination
6       NR      Linkage
8       R       Field link and sequence number

260     R       PUBLICATION, DISTRIBUTION, ETC. (IMPRINT)
ind1    b23     Sequence of publishing statements
ind2    blank   Undefined
a       R       Place of publication, distribution, etc. 
b       R       Name of publisher, distributor, etc. 
c       R       Date of publication, distribution, etc. 
d       NR      Plate or publisher's number for music (Pre-AACR 2)
e       R       Place of manufacture 
f       R       Manufacturer 
g       R       Date of manufacture 
3       NR      Materials specified 
6       NR      Linkage 
8       R       Field link and sequence number 

261     NR      IMPRINT STATEMENT FOR FILMS (Pre-AACR 1 Revised)
ind1    blank   Undefined
ind2    blank   Undefined
a       R       Producing company 
b       R       Releasing company (primary distributor) 
d       R       Date of production, release, etc. 
e       R       Contractual producer 
f       R       Place of production, release, etc. 
6       NR      Linkage 
8       R       Field link and sequence number 

262     NR      IMPRINT STATEMENT FOR SOUND RECORDINGS (Pre-AACR 2)
ind1    blank   Undefined
ind2    blank   Undefined
a       NR      Place of production, release, etc. 
b       NR      Publisher or trade name 
c       NR      Date of production, release, etc. 
k       NR      Serial identification 
l       NR      Matrix and/or take number 
6       NR      Linkage 
8       R       Field link and sequence number 

263     NR      PROJECTED PUBLICATION DATE
ind1    blank   Undefined
ind2    blank   Undefined
a       NR      Projected publication date 
6       NR      Linkage 
8       R       Field link and sequence number 

264     R       PRODUCTION, PUBLICATION, DISTRIBUTION, MANUFACTURE, AND COPYRIGHT NOTICE
ind1    b23     Sequence of statements
ind2    01234   Function of entity
a       R       Place of production, publication, distribution, manufacture
b       R       Name of producer, publisher, distributor, manufacturer
c       R       Date of production, publication, distribution, manufacture, or copyright notice
3       NR      Materials specified
6       NR      Linkage
8       R       Field link and sequence number (R)

270     R       ADDRESS
ind1    b12     Level
ind2    b07     Type of address
a       R       Address 
b       NR      City 
c       NR      State or province 
d       NR      Country 
e       NR      Postal code 
f       NR      Terms preceding attention name 
g       NR      Attention name 
h       NR      Attention position 
i       NR      Type of address 
j       R       Specialized telephone number 
k       R       Telephone number 
l       R       Fax number 
m       R       Electronic mail address 
n       R       TDD or TTY number 
p       R       Contact person 
q       R       Title of contact person 
r       R       Hours 
z       R       Public note 
4       R       Relator code 
6       NR      Linkage 
8       R       Field link and sequence number 

300     R       PHYSICAL DESCRIPTION
ind1    blank   Undefined
ind2    blank   Undefined
a       R       Extent 
b       NR      Other physical details 
c       R       Dimensions 
e       NR      Accompanying material 
f       R       Type of unit 
g       R       Size of unit 
3       NR      Materials specified 
6       NR      Linkage 
8       R       Field link and sequence number 

306     NR      PLAYING TIME
ind1    blank   Undefined
ind2    blank   Undefined
a       R       Playing time 
6       NR      Linkage 
8       R       Field link and sequence number 

307     R       HOURS, ETC.
ind1    b8      Display constant controller
ind2    blank   Undefined
a       NR      Hours 
b       NR      Additional information 
6       NR      Linkage 
8       R       Field link and sequence number 

310     NR      CURRENT PUBLICATION FREQUENCY
ind1    blank   Undefined
ind2    blank   Undefined
a       NR      Current publication frequency 
b       NR      Date of current publication frequency 
6       NR      Linkage 
8       R       Field link and sequence number 

321     R       FORMER PUBLICATION FREQUENCY
ind1    blank   Undefined
ind2    blank   Undefined
a       NR      Former publication frequency 
b       NR      Dates of former publication frequency 
6       NR      Linkage 
8       R       Field link and sequence number 

336     R       CONTENT TYPE
ind1    blank   Undefined
ind2    blank   Undefined
a       R       Content type term
b       R       Content type code
2       NR      Source
3       NR      Materials specified
6       NR      Linkage 
8       R       Field link and sequence number 

337     R       MEDIA TYPE
ind1    blank   Undefined
ind2    blank   Undefined
a       R       Media type term
b       R       Media type code
2       NR      Source
3       NR      Materials specified
6       NR      Linkage 
8       R       Field link and sequence number 

338     R       CARRIER TYPE
ind1    blank   Undefined
ind2    blank   Undefined
a       R       Carrier type term
b       R       Carrier type code
2       NR      Source
3       NR      Materials specified
6       NR      Linkage 
8       R       Field link and sequence number 

340     R       PHYSICAL MEDIUM
ind1    blank   Undefined
ind2    blank   Undefined
a       R       Material base and configuration 
b       R       Dimensions 
c       R       Materials applied to surface 
d       R       Information recording technique 
e       R       Support 
f       R       Production rate/ratio 
h       R       Location within medium 
i       R       Technical specifications of medium 
j       R       Generation
k       R       Layout
m       R       Book format
n       R       Font size
o       R       Polarity
0       R       Authority record control number or standard number
2       NR      Source
3       NR      Materials specified 
6       NR      Linkage 
8       R       Field link and sequence number 

342     R       GEOSPATIAL REFERENCE DATA
ind1    01      Geospatial reference dimension
ind2    012345678    Geospatial reference method
a       NR      Name 
b       NR      Coordinate or distance units 
c       NR      Latitude resolution 
d       NR      Longitude resolution 
e       R       Standard parallel or oblique line latitude 
f       R       Oblique line longitude 
g       NR      Longitude of central meridian or projection center 
h       NR      Latitude of projection origin or projection center 
i       NR      False easting 
j       NR      False northing 
k       NR      Scale factor 
l       NR      Height of perspective point above surface 
m       NR      Azimuthal angle 
o       NR      Landsat number and path number 
p       NR      Zone identifier 
q       NR      Ellipsoid name 
r       NR      Semi-major axis 
s       NR      Denominator of flattening ratio 
t       NR      Vertical resolution 
u       NR      Vertical encoding method 
v       NR      Local planar, local, or other projection or grid description 
w       NR      Local planar or local georeference information 
2       NR      Reference method used 
6       NR      Linkage 
8       R       Field link and sequence number 

343     R       PLANAR COORDINATE DATA
ind1    blank   Undefined
ind2    blank   Undefined
a       NR      Planar coordinate encoding method 
b       NR      Planar distance units 
c       NR      Abscissa resolution 
d       NR      Ordinate resolution 
e       NR      Distance resolution 
f       NR      Bearing resolution 
g       NR      Bearing units 
h       NR      Bearing reference direction 
i       NR      Bearing reference meridian 
6       NR      Linkage 
8       R       Field link and sequence number 

344     R       SOUND CHARACTERISTICS
ind1    blank   Undefined
ind2    blank   Undefined
a       R       Type of recording
b       R       Recording medium
c       R       Playing speed
d       R       Groove characteristic
e       R       Track configuration
f       R       Tape configuration
g       R       Configuration of playback channels
h       R       Special playback characteristics
0       R       Authority record control number or standard number
2       NR      Source
3       NR      Materials specified
6       NR      Linkage
8       R       Field link and sequence number

345     R       PROJECTION CHARACTERISTICS OF MOVING IMAGE
ind1    blank   Undefined
ind2    blank   Undefined
a       R       Presentation format
b       R       Projection speed
0       R       Authority record control number or standard number
2       NR      Source
3       NR      Materials specified
6       NR      Linkage
8       R       Field link and sequence number

346     R       VIDEO CHARACTERISTICS
ind1    blank   Undefined
ind2    blank   Undefined
a       R       Video format
b       R       Broadcast standard
0       R       Authority record control number or standard number
2       NR      Source
3       NR      Materials specified
6       NR      Linkage
8       R       Field link and sequence number

347     R       DIGITAL FILE CHARACTERISTICS
ind1    blank   Undefined
ind2    blank   Undefined
a       R       File type
b       R       Encoding format
c       R       File size
d       R       Resolution
e       R       Regional encoding
f       R       Transmission speed
0       R       Authority record control number or standard number
2       NR      Source
3       NR      Materials specified
6       NR      Linkage
8       R       Field link and sequence number

351     R       ORGANIZATION AND ARRANGEMENT OF MATERIALS
ind1    blank   Undefined
ind2    blank   Undefined
a       R       Organization 
b       R       Arrangement 
c       NR      Hierarchical level 
3       NR      Materials specified 
6       NR      Linkage 
8       R       Field link and sequence number 

352     R       DIGITAL GRAPHIC REPRESENTATION
ind1    blank   Undefined
ind2    blank   Undefined
a       NR      Direct reference method 
b       R       Object type 
c       R       Object count 
d       NR      Row count 
e       NR      Column count 
f       NR      Vertical count 
g       NR      VPF topology level 
i       NR      Indirect reference description 
q       R       Format of the digital image 
6       NR      Linkage 
8       R       Field link and sequence number 

355     R       SECURITY CLASSIFICATION CONTROL
ind1    0123458    Controlled element
ind2    blank   Undefined
a       NR      Security classification 
b       R       Handling instructions 
c       R       External dissemination information 
d       NR      Downgrading or declassification event 
e       NR      Classification system 
f       NR      Country of origin code 
g       NR      Downgrading date 
h       NR      Declassification date 
j       R       Authorization 
6       NR      Linkage 
8       R       Field link and sequence number 

357     NR      ORIGINATOR DISSEMINATION CONTROL
ind1    blank   Undefined
ind2    blank   Undefined
a       NR      Originator control term 
b       R       Originating agency 
c       R       Authorized recipients of material 
g       R       Other restrictions 
6       NR      Linkage 
8       R       Field link and sequence number 

362     R       DATES OF PUBLICATION AND/OR SEQUENTIAL DESIGNATION
ind1    01      Format of date
ind2    blank   Undefined
a       NR      Dates of publication and/or sequential designation 
z       NR      Source of information 
6       NR      Linkage 
8       R       Field link and sequence number 

363     R       NORMALIZED DATE AND SEQUENTIAL DESIGNATION
ind1    b01      Start/End designator
ind2    b01      State of issuanceUndefined
a       NR      First level of enumeration
b       NR      Second level of enumeration
c       NR      Third level of enumeration
d       NR      Fourth level of enumeration
e       NR      Fifth level of enumeration
f       NR      Sixth level of enumeration
g       NR      Alternative numbering scheme, first level of enumeration
h       NR      Alternative numbering scheme, second level of enumeration
i       NR      First level of chronology
j       NR      Second level of chronology
k       NR      Third level of chronology
l       NR      Fourth level of chronology
m       NR      Alternative numbering scheme, chronology
u       NR      First level textual designation
v       NR      First level of chronology, issuance
x       R       Nonpublic note
z       R       Public note
6       NR      Linkage
8       NR      Field link and sequence number

365     R       TRADE PRICE
ind1    blank   Undefined
ind2    blank   Undefined
a       NR      Price type code 
b       NR      Price amount 
c       NR      Currency code 
d       NR      Unit of pricing 
e       NR      Price note 
f       NR      Price effective from 
g       NR      Price effective until 
h       NR      Tax rate 1 
i       NR      Tax rate 2 
j       NR      ISO country code 
k       NR      MARC country code 
m       NR      Identification of pricing entity 
2       NR      Source of price type code 
6       NR      Linkage 
8       R       Field link and sequence number 

366     R       TRADE AVAILABILITY INFORMATION
ind1    blank   Undefined
ind2    blank   Undefined
a       NR      Publishers' compressed title identification 
b       NR      Detailed date of publication 
c       NR      Availability status code 
d       NR      Expected next availability date 
e       NR      Note 
f       NR      Publishers' discount category 
g       NR      Date made out of print 
j       NR      ISO country code 
k       NR      MARC country code 
m       NR      Identification of agency 
2       NR      Source of availability status code 
6       NR      Linkage 
8       R       Field link and sequence number 

377     R       ASSOCIATED LANGUAGE
ind1    blank   Undefined
ind2    b7      Undefined
a       R       Language code
l       R       Language term
2       NR      Source
6       NR      Linkage
8       R       Field link and sequence number

380     R       FORM OF WORK
ind1    blank   Undefined
ind2    blank   Undefined
a       R       Form of work
0       R       Record control number
2       NR      Source of term
6       NR      Linkage
8       R       Field link and sequence number

381     R       OTHER DISTINGUISHING CHARACTERISTICS OF WORK OR EXPRESSION
ind1    blank   Undefined
ind2    blank   Undefined
a       R       Other distinguishing characteristic
u       R       Uniform Resource Identifier
v       R       Source of information
0       R       Record control number
2       NR      Source of term
6       NR      Linkage
8       R       Field link and sequence number

382     R       MEDIUM OF PERFORMANCE
ind1    b01     Undefined
ind2    b01     Undefined
a       R       Medium of performance
b       R       Soloist
d       R       Doubling instrument
n       R       Number of performers of the same medium
p       R       Alternative medium of performance
s       R       Total number of performers
v       R       Note
0       R       Record control number
2       NR      Source of term
6       NR      Linkage
8       R       Field link and sequence number

383     R       NUMERIC DESIGNATION OF MUSICAL WORK
ind1    blank   Undefined
ind2    blank   Undefined
a       R       Serial number
b       R       Opus number
c       R       Thematic index number
d       NR      Thematic index code
e       NR      Publisher associated with opus number
2       NR      Source
6       NR      Linkage
8       R       Field link and sequence number

384     NR      KEY
ind1    b01     Key type
ind2    blank   Undefined
a       NR      Key
6       NR      Linkage
8       R       Field link and sequence number

400     R       SERIES STATEMENT/ADDED ENTRY--PERSONAL NAME 
ind1    013     Type of personal name entry element
ind2    01      Pronoun represents main entry
a       NR      Personal name 
b       NR      Numeration 
c       R       Titles and other words associated with a name 
d       NR      Dates associated with a name 
e       R       Relator term 
f       NR      Date of a work 
g       NR      Miscellaneous information 
k       R       Form subheading 
l       NR      Language of a work 
n       R       Number of part/section of a work 
p       R       Name of part/section of a work 
t       NR      Title of a work 
u       NR      Affiliation 
v       NR      Volume number/sequential designation  
x       NR      International Standard Serial Number  
4       R       Relator code 
6       NR      Linkage 
8       R       Field link and sequence number  

410     R       SERIES STATEMENT/ADDED ENTRY--CORPORATE NAME
ind1    012     Type of corporate name entry element
ind2    01      Pronoun represents main entry
a       NR      Corporate name or jurisdiction name as entry element 
b       R       Subordinate unit 
c       NR      Location of meeting 
d       R       Date of meeting or treaty signing 
e       R       Relator term 
f       NR      Date of a work 
g       NR      Miscellaneous information 
k       R       Form subheading 
l       NR      Language of a work 
n       R       Number of part/section/meeting 
p       R       Name of part/section of a work 
t       NR      Title of a work 
u       NR      Affiliation 
v       NR      Volume number/sequential designation  
x       NR      International Standard Serial Number 
4       R       Relator code 
6       NR      Linkage 
8       R       Field link and sequence number 

411     R       SERIES STATEMENT/ADDED ENTRY--MEETING NAME
ind1    012     Type of meeting name entry element
ind2    01      Pronoun represents main entry
a       NR      Meeting name or jurisdiction name as entry element 
c       NR      Location of meeting 
d       NR      Date of meeting 
e       R       Subordinate unit 
f       NR      Date of a work 
g       NR      Miscellaneous information 
k       R       Form subheading 
l       NR      Language of a work 
n       R       Number of part/section/meeting 
p       R       Name of part/section of a work 
q       NR      Name of meeting following jurisdiction name entry element 
t       NR      Title of a work 
u       NR      Affiliation 
v       NR      Volume number/sequential designation  
x       NR      International Standard Serial Number 
4       R       Relator code 
6       NR      Linkage 
8       R       Field link and sequence number 

440     R       SERIES STATEMENT/ADDED ENTRY--TITLE [OBSOLETE]
ind1    blank   Undefined
ind2    0-9     Nonfiling characters
a       NR      Title 
n       R       Number of part/section of a work 
p       R       Name of part/section of a work 
v       NR      Volume number/sequential designation  
x       NR      International Standard Serial Number 
w       R       Bibliographic record control number
0       R       Authority record control number
6       NR      Linkage 
8       R       Field link and sequence number 

490     R       SERIES STATEMENT
ind1    01      Specifies whether series is traced
ind2    blank   Undefined
a       R       Series statement 
l       NR      Library of Congress call number 
v       R       Volume number/sequential designation  
x       R       International Standard Serial Number 
3       NR      Materials specified
6       NR      Linkage 
8       R       Field link and sequence number 

500     R       GENERAL NOTE
ind1    blank   Undefined
ind2    blank   Undefined
a       NR      General note 
3       NR      Materials specified 
5       NR      Institution to which field applies 
6       NR      Linkage 
8       R       Field link and sequence number 

501     R       WITH NOTE
ind1    blank   Undefined
ind2    blank   Undefined
a       NR      With note 
5       NR      Institution to which field applies 
6       NR      Linkage 
8       R       Field link and sequence number 

502     R       DISSERTATION NOTE
ind1    blank   Undefined
ind2    blank   Undefined
a       NR      Dissertation note 
b       NR      Degree type
c       NR      Name of granting institution
d       NR      Year of degree granted
g       R       Miscellaneous information
o       R       Dissertation identifier
6       NR      Linkage 
8       R       Field link and sequence number 

504     R       BIBLIOGRAPHY, ETC. NOTE
ind1    blank   Undefined
ind2    blank   Undefined
a       NR      Bibliography, etc. note 
b       NR      Number of references 
6       NR      Linkage 
8       R       Field link and sequence number 

505     R       FORMATTED CONTENTS NOTE
ind1    0128    Display constant controller
ind2    b0      Level of content designation
a       NR      Formatted contents note 
g       R       Miscellaneous information 
r       R       Statement of responsibility 
t       R       Title 
u       R       Uniform Resource Identifier 
6       NR      Linkage 
8       R       Field link and sequence number 

506     R       RESTRICTIONS ON ACCESS NOTE
ind1    b01     Restriction
ind2    blank   Undefined
a       NR      Terms governing access 
b       R       Jurisdiction 
c       R       Physical access provisions 
d       R       Authorized users 
e       R       Authorization 
f       R       Standard terminology for access restiction 
u       R       Uniform Resource Identifier 
2       NR      Source of term
3       NR      Materials specified 
5       NR      Institution to which field applies 
6       NR      Linkage 
8       R       Field link and sequence number 

507     NR      SCALE NOTE FOR GRAPHIC MATERIAL
ind1    blank   Undefined
ind2    blank   Undefined
a       NR      Representative fraction of scale note 
b       NR      Remainder of scale note 
6       NR      Linkage 
8       R       Field link and sequence number 

508     R       CREATION/PRODUCTION CREDITS NOTE
ind1    blank   Undefined
ind2    blank   Undefined
a       NR      Creation/production credits note 
6       NR      Linkage 
8       R       Field link and sequence number 

510     R       CITATION/REFERENCES NOTE
ind1    01234   Coverage/location in source
ind2    blank   Undefined
a       NR      Name of source 
b       NR      Coverage of source 
c       NR      Location within source 
u       R       Uniform Resource Identifier
x       NR      International Standard Serial Number 
3       NR      Materials specified 
6       NR      Linkage 
8       R       Field link and sequence number 

511     R       PARTICIPANT OR PERFORMER NOTE
ind1    01      Display constant controller
ind2    blank   Undefined
a       NR      Participant or performer note 
6       NR      Linkage 
8       R       Field link and sequence number 

513     R       TYPE OF REPORT AND PERIOD COVERED NOTE
ind1    blank   Undefined
ind2    blank   Undefined
a       NR      Type of report 
b       NR      Period covered 
6       NR      Linkage 
8       R       Field link and sequence number 

514     NR      DATA QUALITY NOTE
ind1    blank   Undefined
ind2    blank   Undefined
a       NR      Attribute accuracy report 
b       R       Attribute accuracy value 
c       R       Attribute accuracy explanation 
d       NR      Logical consistency report 
e       NR      Completeness report 
f       NR      Horizontal position accuracy report 
g       R       Horizontal position accuracy value 
h       R       Horizontal position accuracy explanation 
i       NR      Vertical positional accuracy report 
j       R       Vertical positional accuracy value 
k       R       Vertical positional accuracy explanation 
m       NR      Cloud cover 
u       R       Uniform Resource Identifier 
z       R       Display note 
6       NR      Linkage 
8       R       Field link and sequence number 

515     R       NUMBERING PECULIARITIES NOTE
ind1    blank   Undefined
ind2    blank   Undefined
a       NR      Numbering peculiarities note 
6       NR      Linkage 
8       R       Field link and sequence number 

516     R       TYPE OF COMPUTER FILE OR DATA NOTE
ind1    b8      Display constant controller
ind2    blank   Undefined
a       NR      Type of computer file or data note 
6       NR      Linkage 
8       R       Field link and sequence number 

518     R       DATE/TIME AND PLACE OF AN EVENT NOTE
ind1    blank   Undefined
ind2    blank   Undefined
a       NR      Date/time and place of an event note 
d       R       Date of event
o       R       Other event information
p       R       Place of event
0       R       Record control number
2       R       Source of term
3       NR      Materials specified 
6       NR      Linkage 
8       R       Field link and sequence number 

520     R       SUMMARY, ETC.
ind1    b012348    Display constant controller
ind2    blank   Undefined
a       NR      Summary, etc. note 
b       NR      Expansion of summary note 
c       NR      Assigning agency
u       R       Uniform Resource Identifier 
2       NR      Source
3       NR      Materials specified 
6       NR      Linkage 
8       R       Field link and sequence number 

521     R       TARGET AUDIENCE NOTE
ind1    b012348    Display constant controller
ind2    blank   Undefined
a       R       Target audience note 
b       NR      Source 
3       NR      Materials specified 
6       NR      Linkage 
8       R       Field link and sequence number 

522     R       GEOGRAPHIC COVERAGE NOTE
ind1    b8      Display constant controller
ind2    blank   Undefined
a       NR      Geographic coverage note 
6       NR      Linkage 
8       R       Field link and sequence number 

524     R       PREFERRED CITATION OF DESCRIBED MATERIALS NOTE
ind1    b8      Display constant controller
ind2    blank   Undefined
a       NR      Preferred citation of described materials note 
2       NR      Source of schema used 
3       NR      Materials specified 
6       NR      Linkage 
8       R       Field link and sequence number 

525     R       SUPPLEMENT NOTE
ind1    blank   Undefined
ind2    blank   Undefined
a       NR      Supplement note 
6       NR      Linkage 
8       R       Field link and sequence number 

526     R       STUDY PROGRAM INFORMATION NOTE
ind1    08      Display constant controller
ind2    blank   Undefined
a       NR      Program name 
b       NR      Interest level 
c       NR      Reading level 
d       NR      Title point value 
i       NR      Display text 
x       R       Nonpublic note 
z       R       Public note 
5       NR      Institution to which field applies 
6       NR      Linkage 
8       R       Field link and sequence number 

530     R       ADDITIONAL PHYSICAL FORM AVAILABLE NOTE
ind1    blank   Undefined
ind2    blank   Undefined
a       NR      Additional physical form available note 
b       NR      Availability source 
c       NR      Availability conditions 
d       NR      Order number 
u       R       Uniform Resource Identifier 
3       NR      Materials specified 
6       NR      Linkage 
8       R       Field link and sequence number 

533     R       REPRODUCTION NOTE
ind1    blank   Undefined
ind2    blank   Undefined
a       NR      Type of reproduction 
b       R       Place of reproduction 
c       R       Agency responsible for reproduction 
d       NR      Date of reproduction 
e       NR      Physical description of reproduction 
f       R       Series statement of reproduction 
m       R       Dates and/or sequential designation of issues reproduced 
n       R       Note about reproduction 
3       NR      Materials specified 
5       NR      Institution to which field applies
6       NR      Linkage 
7       NR      Fixed-length data elements of reproduction 
8       R       Field link and sequence number 

534     R       ORIGINAL VERSION NOTE
ind1    blank   Undefined
ind2    blank   Undefined
a       NR      Main entry of original 
b       NR      Edition statement of original 
c       NR      Publication, distribution, etc. of original 
e       NR      Physical description, etc. of original 
f       R       Series statement of original 
k       R       Key title of original 
l       NR      Location of original 
m       NR      Material specific details 
n       R       Note about original 
o       R       Other resource identifier
p       NR      Introductory phrase 
t       NR      Title statement of original 
x       R       International Standard Serial Number 
z       R       International Standard Book Number 
3       NR      Materials specified
6       NR      Linkage 
8       R       Field link and sequence number 

535     R       LOCATION OF ORIGINALS/DUPLICATES NOTE
ind1    12      Additional information about custodian
ind2    blank   Undefined
a       NR      Custodian 
b       R       Postal address 
c       R       Country 
d       R       Telecommunications address 
g       NR      Repository location code 
3       NR      Materials specified 
6       NR      Linkage 
8       R       Field link and sequence number 

536     R       FUNDING INFORMATION NOTE
ind1    blank   Undefined
ind2    blank   Undefined
a       NR      Text of note 
b       R       Contract number 
c       R       Grant number 
d       R       Undifferentiated number 
e       R       Program element number 
f       R       Project number 
g       R       Task number 
h       R       Work unit number 
6       NR      Linkage 
8       R       Field link and sequence number 

538     R       SYSTEM DETAILS NOTE
ind1    blank   Undefined
ind2    blank   Undefined
a       NR      System details note 
i       NR      Display text 
u       R       Uniform Resource Identifier 
3       NR      Materials specified  
5       NR      Institution to which field applies
6       NR      Linkage 
8       R       Field link and sequence number 

540     R       TERMS GOVERNING USE AND REPRODUCTION NOTE
ind1    blank   Undefined
ind2    blank   Undefined
a       NR      Terms governing use and reproduction 
b       NR      Jurisdiction 
c       NR      Authorization 
d       NR      Authorized users 
u       R       Uniform Resource Identifier 
3       NR      Materials specified 
5       NR      Institution to which field applies 
6       NR      Linkage 
8       R       Field link and sequence number 

541     R       IMMEDIATE SOURCE OF ACQUISITION NOTE
ind1    b01     Undefined
ind2    blank   Undefined
a       NR      Source of acquisition 
b       NR      Address 
c       NR      Method of acquisition 
d       NR      Date of acquisition 
e       NR      Accession number 
f       NR      Owner 
h       NR      Purchase price 
n       R       Extent 
o       R       Type of unit 
3       NR      Materials specified 
5       NR      Institution to which field applies 
6       NR      Linkage 
8       R       Field link and sequence number 

542     R       INFORMATION RELATING TO COPYRIGHT STATUS
ind1    b01     Relationship
ind2    blank   Undefined
a       NR      Personal creator
b       NR      Personal creator death date
c       NR      Corporate creator
d       R       Copyright holder
e       R       Copyright holder contact information
f       R       Copyright statement
g       NR      Copyright date
h       R       Copyright renewal date
i       NR      Publication date
j       NR      Creation date
k       R       Publisher
l       NR      Copyright status
m       NR      Publication status
n       R       Note
o       NR      Research date
q       NR      Assigning agency
r       NR      Jurisdiction of copyright assessment
s       NR      Source of information
u       R       Uniform Resource Identifier
3       NR      Materials specified
6       NR      Linkage
8       R       Field link and sequence number

544     R       LOCATION OF OTHER ARCHIVAL MATERIALS NOTE
ind1    b01     Relationship
ind2    blank   Undefined
a       R       Custodian 
b       R       Address 
c       R       Country 
d       R       Title 
e       R       Provenance 
n       R       Note 
3       NR      Materials specified 
6       NR      Linkage 
8       R       Field link and sequence number 

545     R       BIOGRAPHICAL OR HISTORICAL DATA
ind1    b01     Type of data
ind2    blank   Undefined
a       NR      Biographical or historical note 
b       NR      Expansion 
u       R       Uniform Resource Identifier 
6       NR      Linkage 
8       R       Field link and sequence number 

546     R       LANGUAGE NOTE
ind1    blank   Undefined
ind2    blank   Undefined
a       NR      Language note 
b       R       Information code or alphabet 
3       NR      Materials specified 
6       NR      Linkage 
8       R       Field link and sequence number 

547     R       FORMER TITLE COMPLEXITY NOTE
ind1    blank   Undefined
ind2    blank   Undefined
a       NR      Former title complexity note 
6       NR      Linkage 
8       R       Field link and sequence number 

550     R       ISSUING BODY NOTE
ind1    blank   Undefined
ind2    blank   Undefined
a       NR      Issuing body note 
6       NR      Linkage 
8       R       Field link and sequence number 

552     R       ENTITY AND ATTRIBUTE INFORMATION NOTE
ind1    blank   Undefined
ind2    blank   Undefined
a       NR      Entity type label 
b       NR      Entity type definition and source 
c       NR      Attribute label 
d       NR      Attribute definition and source 
e       R       Enumerated domain value 
f       R       Enumerated domain value definition and source 
g       NR      Range domain minimum and maximum 
h       NR      Codeset name and source 
i       NR      Unrepresentable domain 
j       NR      Attribute units of measurement and resolution 
k       NR      Beginning date and ending date of attribute values 
l       NR      Attribute value accuracy 
m       NR      Attribute value accuracy explanation 
n       NR      Attribute measurement frequency 
o       R       Entity and attribute overview 
p       R       Entity and attribute detail citation 
u       R       Uniform Resource Identifier 
z       R       Display note 
6       NR      Linkage 
8       R       Field link and sequence number 

555     R       CUMULATIVE INDEX/FINDING AIDS NOTE
ind1    b08     Display constant controller
ind2    blank   Undefined
a       NR      Cumulative index/finding aids note 
b       R       Availability source 
c       NR      Degree of control 
d       NR      Bibliographic reference 
u       R       Uniform Resource Identifier 
3       NR      Materials specified 
6       NR      Linkage 
8       R       Field link and sequence number 

556     R       INFORMATION ABOUT DOCUMENTATION NOTE
ind1    b8      Display constant controller
ind2    blank   Undefined
a       NR      Information about documentation note 
z       R       International Standard Book Number 
6       NR      Linkage 
8       R       Field link and sequence number 

561     R       OWNERSHIP AND CUSTODIAL HISTORY
ind1    b01     Undefined
ind2    blank   Undefined
a       NR      History 
u       R       Uniform Resource Identifier
3       NR      Materials specified 
5       NR      Institution to which field applies 
6       NR      Linkage 
8       R       Field link and sequence number 

562     R       COPY AND VERSION IDENTIFICATION NOTE
ind1    blank   Undefined
ind2    blank   Undefined
a       R       Identifying markings 
b       R       Copy identification 
c       R       Version identification 
d       R       Presentation format 
e       R       Number of copies 
3       NR      Materials specified 
5       NR      Institution to which field applies 
6       NR      Linkage 
8       R       Field link and sequence number 

563     R       BINDING INFORMATION
ind1    blank   Undefined
ind2    blank   Undefined
a       NR      Binding note 
u       R       Uniform Resource Identifier 
3       NR      Materials specified 
5       NR      Institution to which field applies 
6       NR      Linkage 
8       R       Field link and sequence number 

565     R       CASE FILE CHARACTERISTICS NOTE
ind1    b08     Display constant controller
ind2    blank   Undefined
a       NR      Number of cases/variables 
b       R       Name of variable 
c       R       Unit of analysis 
d       R       Universe of data 
e       R       Filing scheme or code 
3       NR      Materials specified 
6       NR      Linkage 
8       R       Field link and sequence number 

567     R       METHODOLOGY NOTE
ind1    b8      Display constant controller
ind2    blank   Undefined
a       NR      Methodology note 
6       NR      Linkage 
8       R       Field link and sequence number 

580     R       LINKING ENTRY COMPLEXITY NOTE
ind1    blank   Undefined
ind2    blank   Undefined
a       NR      Linking entry complexity note 
6       NR      Linkage 
8       R       Field link and sequence number 

581     R       PUBLICATIONS ABOUT DESCRIBED MATERIALS NOTE
ind1    b8      Display constant controller
ind2    blank   Undefined
a       NR      Publications about described materials note
z       R       International Standard Book Number 
3       NR      Materials specified 
6       NR      Linkage 
8       R       Field link and sequence number 

583     R       ACTION NOTE
ind1    b01     Undefined
ind2    blank   Undefined
a       NR      Action 
b       R       Action identification 
c       R       Time/date of action 
d       R       Action interval 
e       R       Contingency for action 
f       R       Authorization 
h       R       Jurisdiction 
i       R       Method of action 
j       R       Site of action 
k       R       Action agent 
l       R       Status 
n       R       Extent 
o       R       Type of unit 
u       R       Uniform Resource Identifier 
x       R       Nonpublic note 
z       R       Public note 
2       NR      Source of term 
3       NR      Materials specified 
5       NR      Institution to which field applies 
6       NR      Linkage 
8       R       Field link and sequence number 

584     R       ACCUMULATION AND FREQUENCY OF USE NOTE
ind1    blank   Undefined
ind2    blank   Undefined
a       R       Accumulation 
b       R       Frequency of use 
3       NR      Materials specified 
5       NR      Institution to which field applies 
6       NR      Linkage 
8       R       Field link and sequence number 

585     R       EXHIBITIONS NOTE
ind1    blank   Undefined
ind2    blank   Undefined
a       NR      Exhibitions note 
3       NR      Materials specified 
5       NR      Institution to which field applies 
6       NR      Linkage 
8       R       Field link and sequence number 

586     R       AWARDS NOTE
ind1    b8      Display constant controller
ind2    blank   Undefined
a       NR      Awards note 
3       NR      Materials specified 
6       NR      Linkage 
8       R       Field link and sequence number 

588     R       SOURCE OF DESCRIPTION NOTE
ind1    blank   Undefined
ind2    blank   Undefined
a       NR      Source of description note
5       NR      Institution to which field applies 
6       NR      Linkage 
8       R       Field link and sequence number 

600     R       SUBJECT ADDED ENTRY--PERSONAL NAME
ind1    013     Type of personal name entry element
ind2    01234567    Thesaurus
a       NR      Personal name 
b       NR      Numeration 
c       R       Titles and other words associated with a name
d       NR      Dates associated with a name 
e       R       Relator term 
f       NR      Date of a work 
g       NR      Miscellaneous information 
h       NR      Medium 
j       R       Attribution qualifier 
k       R       Form subheading 
l       NR      Language of a work 
m       R       Medium of performance for music 
n       R       Number of part/section of a work 
o       NR      Arranged statement for music 
p       R       Name of part/section of a work 
q       NR      Fuller form of name 
r       NR      Key for music 
s       NR      Version 
t       NR      Title of a work 
u       NR      Affiliation 
v       R       Form subdivision 
x       R       General subdivision 
y       R       Chronological subdivision 
z       R       Geographic subdivision 
0       R       Authority record control number
2       NR      Source of heading or term 
3       NR      Materials specified 
4       R       Relator code 
6       NR      Linkage 
8       R       Field link and sequence number 

610     R       SUBJECT ADDED ENTRY--CORPORATE NAME
ind1    012     Type of corporate name entry element
ind2    01234567    Thesaurus
a       NR      Corporate name or jurisdiction name as entry element 
b       R       Subordinate unit 
c       NR      Location of meeting 
d       R       Date of meeting or treaty signing 
e       R       Relator term 
f       NR      Date of a work 
g       NR      Miscellaneous information 
h       NR      Medium 
k       R       Form subheading 
l       NR      Language of a work 
m       R       Medium of performance for music 
n       R       Number of part/section/meeting 
o       NR      Arranged statement for music 
p       R       Name of part/section of a work 
r       NR      Key for music 
s       NR      Version 
t       NR      Title of a work 
u       NR      Affiliation 
v       R       Form subdivision 
x       R       General subdivision 
y       R       Chronological subdivision 
z       R       Geographic subdivision 
0       R       Authority record control number
2       NR      Source of heading or term 
3       NR      Materials specified 
4       R       Relator code 
6       NR      Linkage 
8       R       Field link and sequence number 

611     R       SUBJECT ADDED ENTRY--MEETING NAME
ind1    012     Type of meeting name entry element
ind2    01234567    Thesaurus
a       NR      Meeting name or jurisdiction name as entry element 
c       NR      Location of meeting 
d       NR      Date of meeting 
e       R       Subordinate unit 
f       NR      Date of a work 
g       NR      Miscellaneous information 
h       NR      Medium 
j       R       Relator term
k       R       Form subheading 
l       NR      Language of a work 
n       R       Number of part/section/meeting 
p       R       Name of part/section of a work 
q       NR      Name of meeting following jurisdiction name entry element 
s       NR      Version 
t       NR      Title of a work 
u       NR      Affiliation 
v       R       Form subdivision 
x       R       General subdivision 
y       R       Chronological subdivision 
z       R       Geographic subdivision 
0       R       Authority record control number
2       NR      Source of heading or term 
3       NR      Materials specified 
4       R       Relator code 
6       NR      Linkage 
8       R       Field link and sequence number 

630     R       SUBJECT ADDED ENTRY--UNIFORM TITLE
ind1    0-9     Nonfiling characters
ind2    01234567    Thesaurus
a       NR      Uniform title 
d       R       Date of treaty signing 
e       R       Relator term
f       NR      Date of a work 
g       NR      Miscellaneous information 
h       NR      Medium 
k       R       Form subheading 
l       NR      Language of a work 
m       R       Medium of performance for music 
n       R       Number of part/section of a work 
o       NR      Arranged statement for music 
p       R       Name of part/section of a work 
r       NR      Key for music 
s       NR      Version 
t       NR      Title of a work 
v       R       Form subdivision 
x       R       General subdivision 
y       R       Chronological subdivision 
z       R       Geographic subdivision 
0       R       Authority record control number
2       NR      Source of heading or term 
3       NR      Materials specified 
4       R       Relator code
6       NR      Linkage 
8       R       Field link and sequence number 

648     R       SUBJECT ADDED ENTRY--CHRONOLOGICAL TERM
ind1    blank   Undefined
ind2    01234567    Thesaurus
a       NR      Chronological term 
v       R       Form subdivision 
x       R       General subdivision 
y       R       Chronological subdivision 
z       R       Geographic subdivision 
0       R       Authority record control number
2       NR      Source of heading or term 
3       NR      Materials specified 
6       NR      Linkage 
8       R       Field link and sequence number 

650     R       SUBJECT ADDED ENTRY--TOPICAL TERM
ind1    b012    Level of subject
ind2    01234567    Thesaurus
a       NR      Topical term or geographic name as entry element 
b       NR      Topical term following geographic name as entry element 
c       NR      Location of event 
d       NR      Active dates 
e       NR      Relator term 
v       R       Form subdivision 
x       R       General subdivision 
y       R       Chronological subdivision 
z       R       Geographic subdivision 
0       R       Authority record control number
2       NR      Source of heading or term 
3       NR      Materials specified 
4       R       Relator code
6       NR      Linkage 
8       R       Field link and sequence number 

651     R       SUBJECT ADDED ENTRY--GEOGRAPHIC NAME
ind1    blank   Undefined
ind2    01234567    Thesaurus
a       NR      Geographic name 
e       R       Relator term
v       R       Form subdivision 
x       R       General subdivision 
y       R       Chronological subdivision 
z       R       Geographic subdivision 
0       R       Authority record control number
2       NR      Source of heading or term 
3       NR      Materials specified 
4       R       Relator code
6       NR      Linkage 
8       R       Field link and sequence number 

653     R       INDEX TERM--UNCONTROLLED
ind1    b012    Level of index term
ind2    b0123456   Type of term or name
a       R       Uncontrolled term 
6       NR      Linkage 
8       R       Field link and sequence number 

654     R       SUBJECT ADDED ENTRY--FACETED TOPICAL TERMS
ind1    b012    Level of subject
ind2    blank   Undefined
a       R       Focus term 
b       R       Non-focus term 
c       R       Facet/hierarchy designation 
e       R       Relator term
v       R       Form subdivision 
y       R       Chronological subdivision 
z       R       Geographic subdivision 
0       R       Authority record control number
2       NR      Source of heading or term 
3       NR      Materials specified 
4       R       Relator code
6       NR      Linkage 
8       R       Field link and sequence number 

655     R       INDEX TERM--GENRE/FORM
ind1    b0      Type of heading
ind2    01234567    Thesaurus
a       NR      Genre/form data or focus term 
b       R       Non-focus term 
c       R       Facet/hierarchy designation 
v       R       Form subdivision 
x       R       General subdivision 
y       R       Chronological subdivision 
z       R       Geographic subdivision 
0       R       Authority record control number
2       NR      Source of term 
3       NR      Materials specified 
5       NR      Institution to which field applies 
6       NR      Linkage 
8       R       Field link and sequence number 

656     R       INDEX TERM--OCCUPATION
ind1    blank   Undefined
ind2    7       Source of term
a       NR      Occupation 
k       NR      Form 
v       R       Form subdivision 
x       R       General subdivision 
y       R       Chronological subdivision 
z       R       Geographic subdivision 
0       R       Authority record control number
2       NR      Source of term 
3       NR      Materials specified 
6       NR      Linkage 
8       R       Field link and sequence number 

657     R       INDEX TERM--FUNCTION
ind1    blank   Undefined
ind2    7       Source of term
a       NR      Function 
v       R       Form subdivision 
x       R       General subdivision 
y       R       Chronological subdivision 
z       R       Geographic subdivision 
0       R       Authority record control number
2       NR      Source of term 
3       NR      Materials specified 
6       NR      Linkage 
8       R       Field link and sequence number 

658     R       INDEX TERM--CURRICULUM OBJECTIVE
ind1    blank   Undefined
ind2    blank   Undefined
a       NR      Main curriculum objective 
b       R       Subordinate curriculum objective 
c       NR      Curriculum code 
d       NR      Correlation factor 
2       NR      Source of term or code 
6       NR      Linkage 
8       R       Field link and sequence number 

662     R       SUBJECT ADDED ENTRY--HIERARCHICAL PLACE NAME
ind1    blank   Undefined
ind2    blank   Undefined
a       R       Country or larger entity
b       NR      First-order political jurisdiction
c       R       Intermediate political jurisdiction
d       NR      City
e       R       Relator term
f       R       City subsection
g       R       Other nonjurisdictional geographic region and feature
h       R       Extraterrestrial area
0       R       Authority record control number
2       NR      Source of heading or term
4       R       Relator code
6       NR      Linkage
8       R       Field link and sequence number

700     R       ADDED ENTRY--PERSONAL NAME
ind1    013     Type of personal name entry element
ind2    b2      Type of added entry
a       NR      Personal name 
b       NR      Numeration 
c       R       Titles and other words associated with a name 
d       NR      Dates associated with a name 
e       R       Relator term 
f       NR      Date of a work 
g       NR      Miscellaneous information 
h       NR      Medium 
i       R       Relationship information
j       R       Attribution qualifier 
k       R       Form subheading 
l       NR      Language of a work 
m       R       Medium of performance for music 
n       R       Number of part/section of a work 
o       NR      Arranged statement for music 
p       R       Name of part/section of a work 
q       NR      Fuller form of name 
r       NR      Key for music 
s       NR      Version 
t       NR      Title of a work 
u       NR      Affiliation 
x       NR      International Standard Serial Number 
0       R       Authority record control number
3       NR      Materials specified 
4       R       Relator code 
5       NR      Institution to which field applies 
6       NR      Linkage 
8       R       Field link and sequence number 

710     R       ADDED ENTRY--CORPORATE NAME
ind1    012     Type of corporate name entry element
ind2    b2      Type of added entry
a       NR      Corporate name or jurisdiction name as entry element 
b       R       Subordinate unit 
c       NR      Location of meeting 
d       R       Date of meeting or treaty signing 
e       R       Relator term 
f       NR      Date of a work 
g       NR      Miscellaneous information 
h       NR      Medium 
i       R       Relationship information
k       R       Form subheading 
l       NR      Language of a work 
m       R       Medium of performance for music 
n       R       Number of part/section/meeting 
o       NR      Arranged statement for music 
p       R       Name of part/section of a work 
r       NR      Key for music 
s       NR      Version 
t       NR      Title of a work 
u       NR      Affiliation 
x       NR      International Standard Serial Number 
0       R       Authority record control number
3       NR      Materials specified 
4       R       Relator code 
5       NR      Institution to which field applies 
6       NR      Linkage 
8       R       Field link and sequence number 

711     R       ADDED ENTRY--MEETING NAME
ind1    012     Type of meeting name entry element
ind2    b2      Type of added entry
a       NR      Meeting name or jurisdiction name as entry element 
c       NR      Location of meeting 
d       NR      Date of meeting 
e       R       Subordinate unit 
f       NR      Date of a work 
g       NR      Miscellaneous information 
h       NR      Medium 
i       R       Relationship information
j       R       Relator term
k       R       Form subheading 
l       NR      Language of a work 
n       R       Number of part/section/meeting 
p       R       Name of part/section of a work 
q       NR      Name of meeting following jurisdiction name entry element 
s       NR      Version 
t       NR      Title of a work 
u       NR      Affiliation 
x       NR      International Standard Serial Number 
0       R       Authority record control number
3       NR      Materials specified 
4       R       Relator code 
5       NR      Institution to which field applies 
6       NR      Linkage 
8       R       Field link and sequence number 

720     R       ADDED ENTRY--UNCONTROLLED NAME
ind1    b12     Type of name
ind2    blank   Undefined
a       NR      Name 
e       R       Relator term 
4       R       Relator code 
6       NR      Linkage 
8       R       Field link and sequence number 

730     R       ADDED ENTRY--UNIFORM TITLE
ind1    0-9     Nonfiling characters
ind2    b2      Type of added entry
a       NR      Uniform title 
d       R       Date of treaty signing 
f       NR      Date of a work 
g       NR      Miscellaneous information 
h       NR      Medium 
i       R       Relationship information
k       R       Form subheading 
l       NR      Language of a work 
m       R       Medium of performance for music 
n       R       Number of part/section of a work 
o       NR      Arranged statement for music 
p       R       Name of part/section of a work 
r       NR      Key for music 
s       NR      Version 
t       NR      Title of a work 
x       NR      International Standard Serial Number 
0       R       Authority record control number
3       NR      Materials specified 
5       NR      Institution to which field applies 
6       NR      Linkage 
8       R       Field link and sequence number 

740     R       ADDED ENTRY--UNCONTROLLED RELATED/ANALYTICAL TITLE
ind1    0-9     Nonfiling characters
ind2    b2      Type of added entry
a       NR      Uncontrolled related/analytical title 
h       NR      Medium 
n       R       Number of part/section of a work 
p       R       Name of part/section of a work 
5       NR      Institution to which field applies 
6       NR      Linkage 
8       R       Field link and sequence number 

751     R       ADDED ENTRY--GEOGRAPHIC NAME
ind1    blank   Undefined
ind2    blank   Undefined
a       NR      Geographic name
e       R       Relator term
0       R       Authority record control number
2       NR      Source of heading or term
3       NR      Materials specified
4       R       Relator code
6       NR      Linkage
8       R       Field link and sequence number

752     R       ADDED ENTRY--HIERARCHICAL PLACE NAME
ind1    blank   Undefined
ind2    blank   Undefined
a       NR      Country or larger entity
b       NR      First-order political jurisdiction
c       NR      Intermediate political jurisdiction
d       NR      City
f       R       City subsection
g       R       Other nonjurisdictional geographic region and feature
h       R       Extraterrestrial area
0       R       Authority record control number
2       NR      Source of heading or term
6       NR      Linkage
8       R       Field link and sequence number

753     R       SYSTEM DETAILS ACCESS TO COMPUTER FILES
ind1    blank   Undefined
ind2    blank   Undefined
a       NR      Make and model of machine 
b       NR      Programming language 
c       NR      Operating system 
6       NR      Linkage 
8       R       Field link and sequence number 

754     R       ADDED ENTRY--TAXONOMIC IDENTIFICATION
ind1    blank   Undefined
ind2    blank   Undefined
a       R       Taxonomic name 
c       R       Taxonomic category 
d       R       Common or alternative name 
x       R       Non-public note 
z       R       Public note 
0       R       Authority record control number
2       NR      Source of taxonomic identification 
6       NR      Linkage 
8       R       Field link and sequence number 

760     R       MAIN SERIES ENTRY
ind1    01      Note controller
ind2    b8      Display constant controller
a       NR      Main entry heading 
b       NR      Edition 
c       NR      Qualifying information 
d       NR      Place, publisher, and date of publication 
g       R       Related parts
h       NR      Physical description 
i       R       Relationship information
m       NR      Material-specific details 
n       R       Note 
o       R       Other item identifier 
s       NR      Uniform title 
t       NR      Title 
w       R       Record control number 
x       NR      International Standard Serial Number 
y       NR      CODEN designation 
4       R       Relationship code
6       NR      Linkage 
7       NR      Control subfield 
8       R       Field link and sequence number 

762     R       SUBSERIES ENTRY
ind1    01      Note controller
ind2    b8      Display constant controller
a       NR      Main entry heading 
b       NR      Edition 
c       NR      Qualifying information 
d       NR      Place, publisher, and date of publication 
g       R       Related parts
h       NR      Physical description 
i       R       Relationship information
m       NR      Material-specific details 
n       R       Note 
o       R       Other item identifier 
s       NR      Uniform title 
t       NR      Title 
w       R       Record control number 
x       NR      International Standard Serial Number 
y       NR      CODEN designation 
4       R       Relationship code
6       NR      Linkage 
7       NR      Control subfield 
8       R       Field link and sequence number 

765     R       ORIGINAL LANGUAGE ENTRY
ind1    01      Note controller
ind2    b8      Display constant controller
a       NR      Main entry heading 
b       NR      Edition 
c       NR      Qualifying information 
d       NR      Place, publisher, and date of publication 
g       R       Related parts
h       NR      Physical description 
i       R       Relationship information
k       R       Series data for related item 
m       NR      Material-specific details 
n       R       Note 
o       R       Other item identifier 
r       R       Report number 
s       NR      Uniform title 
t       NR      Title 
u       NR      Standard Technical Report Number 
w       R       Record control number 
x       NR      International Standard Serial Number 
y       NR      CODEN designation 
z       R       International Standard Book Number 
4       R       Relationship code
6       NR      Linkage 
7       NR      Control subfield 
8       R       Field link and sequence number 

767     R       TRANSLATION ENTRY
ind1    01      Note controller
ind2    b8      Display constant controller
a       NR      Main entry heading 
b       NR      Edition 
c       NR      Qualifying information 
d       NR      Place, publisher, and date of publication 
g       R       Related parts
h       NR      Physical description 
i       R       Relationship information
k       R       Series data for related item 
m       NR      Material-specific details 
n       R       Note 
o       R       Other item identifier 
r       R       Report number 
s       NR      Uniform title 
t       NR      Title 
u       NR      Standard Technical Report Number 
w       R       Record control number 
x       NR      International Standard Serial Number 
y       NR      CODEN designation 
z       R       International Standard Book Number 
4       R       Relationship code
6       NR      Linkage 
7       NR      Control subfield 
8       R       Field link and sequence number 

770     R       SUPPLEMENT/SPECIAL ISSUE ENTRY
ind1    01      Note controller
ind2    b8      Display constant controller
a       NR      Main entry heading 
b       NR      Edition 
c       NR      Qualifying information 
d       NR      Place, publisher, and date of publication 
g       R       Related parts
h       NR      Physical description 
i       R       Relationship information
k       R       Series data for related item 
m       NR      Material-specific details 
n       R       Note 
o       R       Other item identifier 
r       R       Report number 
s       NR      Uniform title 
t       NR      Title 
u       NR      Standard Technical Report Number 
w       R       Record control number 
x       NR      International Standard Serial Number 
y       NR      CODEN designation 
z       R       International Standard Book Number 
4       R       Relationship code
6       NR      Linkage 
7       NR      Control subfield 
8       R       Field link and sequence number 

772     R       SUPPLEMENT PARENT ENTRY
ind1    01      Note controller
ind2    b08     Display constant controller
a       NR      Main entry heading 
b       NR      Edition 
c       NR      Qualifying information 
d       NR      Place, publisher, and date of publication 
g       R       Related parts
h       NR      Physical description 
i       R       Relationship information
k       R       Series data for related item 
m       NR      Material-specific details 
n       R       Note 
o       R       Other item identifier 
r       R       Report number 
s       NR      Uniform title 
t       NR      Title 
u       NR      Standard Technical Report Number 
w       R       Record control number 
x       NR      International Standard Serial Number 
y       NR      CODEN designation 
z       R       International Stan dard Book Number 
4       R       Relationship code
6       NR      Linkage 
7       NR      Control subfield 
8       R       Field link and sequence number 

773     R       HOST ITEM ENTRY
ind1    01      Note controller
ind2    b8      Display constant controller
a       NR      Main entry heading 
b       NR      Edition 
d       NR      Place, publisher, and date of publication 
g       R       Related parts
h       NR      Physical description 
i       R       Relationship information
k       R       Series data for related item 
m       NR      Material-specific details 
n       R       Note 
o       R       Other item identifier 
p       NR      Abbreviated title 
q       NR      Enumeration and first page 
r       R       Report number 
s       NR      Uniform title 
t       NR      Title 
u       NR      Standard Technical Report Number 
w       R       Record control number 
x       NR      International Standard Serial Number 
y       NR      CODEN designation 
z       R       International Standard Book Number 
3       NR      Materials specified 
4       R       Relationship code
6       NR      Linkage 
7       NR      Control subfield 
8       R       Field link and sequence number 

774     R       CONSTITUENT UNIT ENTRY
ind1    01      Note controller
ind2    b8      Display constant controller
a       NR      Main entry heading 
b       NR      Edition 
c       NR      Qualifying information 
d       NR      Place, publisher, and date of publication 
g       R       Related parts
h       NR      Physical description 
i       R       Relationship information
k       R       Series data for related item 
m       NR      Material-specific details 
n       R       Note 
o       R       Other item identifier 
r       R       Report number 
s       NR      Uniform title 
t       NR      Title 
u       NR      Standard Technical Report Number 
w       R       Record control number 
x       NR      International Standard Serial Number 
y       NR      CODEN designation 
z       R       International Standard Book Number 
4       R       Relationship code
6       NR      Linkage 
7       NR      Control subfield 
8       R       Field link and sequence number 

775     R       OTHER EDITION ENTRY
ind1    01      Note controller
ind2    b8      Display constant controller
a       NR      Main entry heading 
b       NR      Edition 
c       NR      Qualifying information 
d       NR      Place, publisher, and date of publication 
e       NR      Language code 
f       NR      Country code 
g       R       Related parts
h       NR      Physical description 
i       R       Relationship information
k       R       Series data for related item 
m       NR      Material-specific details 
n       R       Note 
o       R       Other item identifier 
r       R       Report number 
s       NR      Uniform title 
t       NR      Title 
u       NR      Standard Technical Report Number 
w       R       Record control number 
x       NR      International Standard Serial Number 
y       NR      CODEN designation 
z       R       International Standard Book Number 
4       R       Relationship code
6       NR      Linkage 
7       NR      Control subfield 
8       R       Field link and sequence number 

776     R       ADDITIONAL PHYSICAL FORM ENTRY
ind1    01      Note controller
ind2    b8      Display constant controller
a       NR      Main entry heading 
b       NR      Edition 
c       NR      Qualifying information 
d       NR      Place, publisher, and date of publication 
g       R       Related parts
h       NR      Physical description 
i       R       Relationship information
k       R       Series data for related item 
m       NR      Material-specific details 
n       R       Note 
o       R       Other item identifier 
r       R       Report number 
s       NR      Uniform title 
t       NR      Title 
u       NR      Standard Technical Report Number 
w       R       Record control number 
x       NR      International Standard Serial Number 
y       NR      CODEN designation 
z       R       International Standard Book Number 
4       R       Relationship code
6       NR      Linkage 
7       NR      Control subfield 
8       R       Field link and sequence number 

777     R       ISSUED WITH ENTRY
ind1    01      Note controller
ind2    b8      Display constant controller
a       NR      Main entry heading 
b       NR      Edition 
c       NR      Qualifying information 
d       NR      Place, publisher, and date of publication 
g       R       Related parts
h       NR      Physical description 
i       R       Relationship information
k       R       Series data for related item 
m       NR      Material-specific details 
n       R       Note 
o       R       Other item identifier 
s       NR      Uniform title 
t       NR      Title 
w       R       Record control number 
x       NR      International Standard Serial Number 
y       NR      CODEN designation 
4       R       Relationship code
6       NR      Linkage 
7       NR      Control subfield 
8       R       Field link and sequence number 

780     R       PRECEDING ENTRY
ind1    01      Note controller
ind2    01234567    Type of relationship
a       NR      Main entry heading 
b       NR      Edition 
c       NR      Qualifying information 
d       NR      Place, publisher, and date of publication 
g       R       Related parts
h       NR      Physical description 
i       R       Relationship information
k       R       Series data for related item 
m       NR      Material-specific details 
n       R       Note 
o       R       Other item identifier 
r       R       Report number 
s       NR      Uniform title 
t       NR      Title 
u       NR      Standard Technical Report Number 
w       R       Record control number 
x       NR      International Standard Serial Number 
y       NR      CODEN designation 
z       R       International Standard Book Number 
4       R       Relationship code
6       NR      Linkage 
7       NR      Control subfield 
8       R       Field link and sequence number 

785     R       SUCCEEDING ENTRY
ind1    01      Note controller
ind2    012345678    Type of relationship
a       NR      Main entry heading 
b       NR      Edition 
c       NR      Qualifying information 
d       NR      Place, publisher, and date of publication 
g       R       Related parts
h       NR      Physical description 
i       R       Relationship information
k       R       Series data for related item 
m       NR      Material-specific details 
n       R       Note 
o       R       Other item identifier 
r       R       Report number 
s       NR      Uniform title 
t       NR      Title 
u       NR      Standa rd Technical Report Number 
w       R       Record control number 
x       NR      International Standard Serial Number 
y       NR      CODEN designation 
z       R       International Standard Book Number 
4       R       Relationship code
6       NR      Linkage 
7       NR      Control subfield 
8       R       Field link and sequence number 

786     R       DATA SOURCE ENTRY
ind1    01      Note controller
ind2    b8      Display constant controller
a       NR      Main entry heading 
b       NR      Edition 
c       NR      Qualifying information 
d       NR      Place, publisher, and date of publication 
g       R       Related parts
h       NR      Physical description 
i       R       Relationship information
j       NR      Period of content 
k       R       Series data for related item 
m       NR      Material-specific details 
n       R       Note 
o       R       Other item identifier 
p       NR      Abbreviated title 
r       R       Report number 
s       NR      Uniform title 
t       NR      Title 
u       NR      Standard Technical Report Number 
v       NR      Source Contribution 
w       R       Record control number 
x       NR      International Standard Serial Number 
y       NR      CODEN designation 
z       R       International Standard Book Number 
4       R       Relationship code
6       NR      Linkage 
7       NR      Control subfield 
8       R       Field link and sequence number 

787     R       OTHER RELATIONSHIP ENTRY
ind1    01      Note controller
ind2    b8      Display constant controller
a       NR      Main entry heading 
b       NR      Edition 
c       NR      Qualifying information 
d       NR      Place, publisher, and date of publication 
g       R       Related parts
h       NR      Physical description 
i       R       Relationship information
k       R       Series data for related item 
m       NR      Material-specific details 
n       R       Note 
o       R       Other item identifier 
r       R       Report number 
s       NR      Uniform title 
t       NR      Title 
u       NR      Standard Technical Report Number 
w       R       Record control number 
x       NR      International Standard Serial Number 
y       NR      CODEN designation 
z       R       International Standard Book Number 
4       R       Relationship code
6       NR      Linkage 
7       NR      Control subfield 
8       R       Field link and sequence number 

800     R       SERIES ADDED ENTRY--PERSONAL NAME
ind1    013     Type of personal name entry element
ind2    blank   Undefined
a       NR      Personal name 
b       NR      Numeration 
c       R       Titles and other words associated with a name 
d       NR      Dates associated with a name 
e       R       Relator term 
f       NR      Date of a work 
g       NR      Miscellaneous information 
h       NR      Medium 
j       R       Attribution qualifier 
k       R       Form subheading 
l       NR      Language of a work 
m       R       Medium of performance for music 
n       R       Number of part/section of a work  
o       NR      Arranged statement for music 
p       R       Name of part/section of a work 
q       NR      Fuller form of name 
r       NR      Key for music 
s       NR      Version 
t       NR      Title of a work 
u       NR      Affiliation 
v       NR      Volume/sequential designation  
w       R       Bibliographic record control number
x       NR      International Standard Serial Number
0       R       Authority record control number
3       NR      Materials specified
4       R       Relator code 
5       R       Institution to which field applies
6       NR      Linkage 
8       R       Field link and sequence number 

810     R       SERIES ADDED ENTRY--CORPORATE NAME
ind1    012     Type of corporate name entry element
ind2    blank   Undefined
a       NR      Corporate name or jurisdiction name as entry element 
b       R       Subordinate unit 
c       NR      Location of meeting 
d       R       Date of meeting or treaty signing 
e       R       Relator term 
f       NR      Date of a work 
g       NR      Miscellaneous information 
h       NR      Medium 
k       R       Form subheading 
l       NR      Language of a work 
m       R       Medium of performance for music 
n       R       Number of part/section/meeting 
o       NR      Arranged statement for music 
p       R       Name of part/section of a work 
r       NR      Key for music 
s       NR      Version 
t       NR      Title of a work 
u       NR      Affiliation 
v       NR      Volume/sequential designation 
w       R       Bibliographic record control number
x       NR      International Standard Serial Number
0       R       Authority record control number
3       NR      Materials specified
4       R       Relator code 
5       R       Institution to which field applies
6       NR      Linkage 
8       R       Field link and sequence number 

811     R       SERIES ADDED ENTRY--MEETING NAME
ind1    012     Type of meeting name entry element
ind2    blank   Undefined
a       NR      Meeting name or jurisdiction name as entry element 
c       NR      Location of meeting 
d       NR      Date of meeting 
e       R       Subordinate unit 
f       NR      Date of a work 
g       NR      Miscellaneous information 
h       NR      Medium 
j       R       Relator term
k       R       Form subheading 
l       NR      Language of a work 
n       R       Number of part/section/meeting 
p       R       Name of part/section of a work 
q       NR      Name of meeting following jurisdiction name entry element 
s       NR      Version 
t       NR      Title of a work 
u       NR      Affiliation 
v       NR      Volume/sequential designation 
w       R       Bibliographic record control number
x       NR      International Standard Serial Number
0       R       Authority record control number
3       NR      Materials specified
4       R       Relator code 
5       R       Institution to which field applies
6       NR      Linkage 
8       R       Field link and sequence number 

830     R       SERIES ADDED ENTRY--UNIFORM TITLE
ind1    blank   Undefined
ind2    0-9     Nonfiling characters
a       NR      Uniform title 
d       R       Date of treaty signing 
f       NR      Date of a work 
g       NR      Miscellaneous information 
h       NR      Medium 
k       R       Form subheading 
l       NR      Language of a work 
m       R       Medium of performance for music 
n       R       Number of part/section of a work 
o       NR      Arranged statement for music 
p       R       Name of part/section of a work 
r       NR      Key for music 
s       NR      Version 
t       NR      Title of a work 
v       NR      Volume/sequential designation 
w       R       Bibliographic record control number
x       NR      International Standard Serial Number
0       R       Authority record control number
3       NR      Materials specified
5       R       Institution to which field applies
6       NR      Linkage 
8       R       Field link and sequence number 

841     NR      HOLDINGS CODED DATA VALUES

842     NR      TEXTUAL PHYSICAL FORM DESIGNATOR

843     R       REPRODUCTION NOTE

844     NR      NAME OF UNIT

845     R       TERMS GOVERNING USE AND REPRODUCTION NOTE

850     R       HOLDING INSTITUTION
ind1    blank   Undefined
ind2    blank   Undefined
a       R       Holding institution 
8       R       Field link and sequence number 

852     R       LOCATION
ind1    b012345678    Shelving scheme
ind2    b012    Shelving order
a       NR      Location 
b       R       Sublocation or collection 
c       R       Shelving location 
d       R       Former shelving location
e       R       Address 
f       R       Coded location qualifier 
g       R       Non-coded location qualifier 
h       NR      Classification part 
i       R       Item part 
j       NR      Shelving control number 
k       R       Call number prefix 
l       NR      Shelving form of title 
m       R       Call number suffix 
n       NR      Country code 
p       NR      Piece designation 
q       NR      Piece physical condition 
s       R       Copyright article-fee code 
t       NR      Copy number 
u       R       Uniform Resource Identifier
x       R       Nonpublic note 
z       R       Public note 
2       NR      Source of classification or shelving scheme 
3       NR      Materials specified 
6       NR      Linkage 
8       NR      Sequence number 

853     R       CAPTIONS AND PATTERN--BASIC BIBLIOGRAPHIC UNIT

854     R       CAPTIONS AND PATTERN--SUPPLEMENTARY MATERIAL

855     R       CAPTIONS AND PATTERN--INDEXES

856     R       ELECTRONIC LOCATION AND ACCESS
ind1    b012347    Access method
ind2    b0128   Relationship
a       R       Host name 
b       R       Access number 
c       R       Compression information 
d       R       Path 
f       R       Electronic name 
h       NR      Processor of request 
i       R       Instruction 
j       NR      Bits per second 
k       NR      Password 
l       NR      Logon 
m       R       Contact for access assistance 
n       NR      Name of location of host 
o       NR      Operating system 
p       NR      Port 
q       NR      Electronic format type 
r       NR      Settings 
s       R       File size 
t       R       Terminal emulation 
u       R       Uniform Resource Identifier 
v       R       Hours access method available 
w       R       Record control number 
x       R       Nonpublic note 
y       R       Link text 
z       R       Public note 
2       NR      Access method 
3       NR      Materials specified 
6       NR      Linkage 
8       R       Field link and sequence number 

863     R       ENUMERATION AND CHRONOLOGY--BASIC BIBLIOGRAPHIC UNIT

864     R       ENUMERATION AND CHRONOLOGY--SUPPLEMENTARY MATERIAL

865     R       ENUMERATION AND CHRONOLOGY--INDEXES

866     R       TEXTUAL HOLDINGS--BASIC BIBLIOGRAPHIC UNIT

867     R       TEXTUAL HOLDINGS--SUPPLEMENTARY MATERIAL

868     R       TEXTUAL HOLDINGS--INDEXES

876     R       ITEM INFORMATION--BASIC BIBLIOGRAPHIC UNIT

877     R       ITEM INFORMATION--SUPPLEMENTARY MATERIAL

878     R       ITEM INFORMATION--INDEXES

880     R       ALTERNATE GRAPHIC REPRESENTATION
ind1            Same as associated field
ind2            Same as associated field
6       NR      Linkage

882     NR      REPLACEMENT RECORD INFORMATION
ind1    blank   Undefined
ind2    blank   Undefined
a       R       Replacement title
i       R       Explanatory text
w       R       Replacement bibliographic record control number
6       NR      Linkage
8       R       Field link and sequence number

886     R       FOREIGN MARC INFORMATION FIELD
ind1    012     Type of field
ind2    blank   Undefined
a       NR      Tag of the foreign MARC field
b       NR      Content of the foreign MARC field
c-z     NR      Foreign MARC subfield
0-1     NR      Foreign MARC subfield
2       NR      Source of data
4       NR      Source of data
3-9     NR      Source of data

887     R       NON-MARC INFORMATION FIELD
ind1    blank   Undefined
ind2    blank   Undefined
a       NR      Content of non-MARC field
2       NR      Source of data