/ 
Catmandu-MARC-1.33
River stage one • 1 direct dependent • 1 total dependent
/ Catmandu::Fix::marc_copy

NAME

Catmandu::Fix::marc_copy - copy marc data in a structured way to a new field

SYNOPSIS

# Cut the 001 field out of the MARC record into the fixed001
marc_copy(001, fixed001)

# Cut all 650 fields out of the MARC record into the subjects array
marc_copy(650, subjects)

DESCRIPTION

Copy MARC data referred by MARC_TAG in a structured way to JSON path.

In contrast to Catmandu::Fix::marc_map and Catmandu::Fix::marc_spec marc_copy will not only copy data content (values) but also all data elements like tag, indicators and subfield codes into a nested data structure.

METHODS

marc_copy(MARC_PATH, JSON_PATH, [equals: REGEX])

Copy this MARC fields referred by a MARC_PATH to a JSON_PATH. When an equals value has been provided, then only the MARC_PATHs with a value equal to equals will be copied to JSON_PATH. When the MARC_PATH points to a subfield, then the subfield value need to match equals. When the MARC_PATH points multiple subfields, then a concatinated string value needs to match equals:

Data:
100 $aMy$bField.

# copy only the 100 fields which have a $a subfield
marc_copy(100a,tmp)

# copy only the 100 fields with have a $a subfield matching 'My'
marc_copy(100a,tmp,equals:"My")

# copy only the 100 fields with have a concatinated string value 'MyField.'
# (equals is an regex, the period "." needs to be escaped "\.")
marc_copy(100,tmp,equals:"MyField\.")

# copy only the 100 fields which have a "." at the end
marc_copy(100,tmp,equals:"\.$")

More examples:

# Copy all the 300 fields
marc_copy(300,tmp)

# Copy all the 300 fields with indicator 1 = 1
marc_copy(300[1],tmp)

# Copy all the 300 fields which have subfield c
marc_copy(300c,tmp)

# Copy all the 300 fields which have subfield c equal to 'ABC'
marc_copy(300c,tmp,equals:"^ABC")

The JSON_PATH C<tmp> will contain an array with one item per field that was copied.
Each item is a hash containing the following fields:

  tmp.*.tag        - The names of the MARC field
  tmp.*.ind1       - The value of the first indicator
  tmp.*.ind2       - The value of the second indicator
  tmp.*.subfields  - An array of subfield items. Each subfield item is a
                     hash of the subfield code and subfield value

E.g.

    tmp:
    - tag: '300'
      ind1: ' '
      ind2: ' '
      subfields:
      - a: 'blabla:'
      - v: 'test123'
      - c: 'ok123'

These JSON paths can be used like:

    # Set the first indicator of all 300 fields
    do marc_each(var:this)
      if all_match(this.tag,300)

        # Set the first indicator to 1
        set_field(this.ind1,1)

        marc_paste(this)
      end
    end

    # Capitalize all the v subfields of 300
    do marc_each(var:this)
        if all_match(this.tag,300)

         do list(path:this.subfields, var:loop)
            if (exists(loop.v))
                upcase(loop.v)
            end
         end

         marc_paste(this)
      end
    end

INLINE

This Fix can be used inline in a Perl script:

use Catmandu::Fix::marc_copy as => 'marc_copy';

my $data = { record => ['650', ' ', 0, 'a', 'Perl'] };

$data = marc_copy($data,'650','subject');

print $data->{subject}->[0]->{tag} , "\n"; # '650'
print $data->{subject}->[0]->{ind1} , "\n"; # ' '
print $data->{subject}->[0]->{ind2} , "\n"; # 0
print $data->{subject}->[0]->{subfields}->[0]->{a} , "\n"; # 'Perl'

SEE ALSO

LICENSE AND COPYRIGHT

This program is free software; you can redistribute it and/or modify it under the terms of either: the GNU General Public License as published by the Free Software Foundation; or the Artistic License.

See http://dev.perl.org/licenses/ for more information.