Jenn, that's a misapplication of the fieldaddtobeg function. Here's the definition for that function:

fieldaddtobeg | field | data
  field       3 digits specify the field
  data        new field data added to the beginning of the field
  (only for fields without indicators (001-009)

It adds data to the beginning of those sub-010 fields. It does not add a new field.

To add a field, use the ADD stanza; from the documentation:

[ADD]
field | L1 | L2 | # | subfield | data

  field
    3 digits specify which field to add
  L1
    the first indicator character; space if empty
  L2
    the second indicator character; space if empty
  #
    the number of subfield+data pairings following
  subfield
    1 character denoting the subfield
  data
    the subfield data

In each case, the field, with specified indicators, if any, subfield, and data
is added as a complete field, whether or not such a field already exists.

If you're adding a fixed field, leave L1, L2, "#", and subfield blank, empty,
i.e., not even a space; to wit:  009|||||this is 009 stuff

I hope this helps.

Roy


On 5/12/2011 12:48 PM, Bryan Baldus wrote:
On Thursday, May 12, 2011 10:58 AM, Jenn Nolte wrote:
I am working on a shell script that will process the MARC records that 
represent items from our e-serials management database, and the thing I am 
stuck on is adding brand new 006 and 007 fixed field tags to each record. I am 
using the marcedit.pl fieldaddtobeg function, but it corrupts the records and 
makes them unparseable.
Is there a quick and easy way to do this within a script? (I know Perl works 
best with MARC but I am open to any suggestions).
I'm not familiar with marcedit.pl. I'd use MARC::Batch and its related modules, 
similar to the mock-up listed below (which assumes the 008 to be present to 
insert the new field(s) in the proper order; I've thrown the code together 
haphazardly, so it may contain errors). Of course with 006 and 007, you also 
run into length issues--006 is always 18 bytes; 007's length depends on the 
category of material. If the fields don't have the correct length, some systems 
may reject the records.

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

use MARC::Batch;

#$inputfile = "path_to_your_file_however_you_get_it";

my $batch = MARC::Batch->new('USMARC', "$inputfile");

#$exportfile = "path_to_your_file_however_you_get_it";

open(OUT, ">$exportfile") or die "Can not open $exportfile, $!";

RECORD: while (my $record = $batch->next()) {

#       $field006 = ''; #string of valid 006 characters (change 006 to 007 for 
007)
         my $new006 = MARC::Field->new( '006', $field006);
         $record->insert_fields_before($record->field('008'), ($new006));

print OUT $record->as_usmarc();

}# while records

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

I hope this helps,

Bryan Baldus
Cataloger
Quality Books Inc.
The Best of America's Independent Presses
1-800-323-4241x402
bryan.bal...@quality-books.com
eij...@cpan.org
http://home.comcast.net/~eijabb/

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