C4/AuthoritiesMarc/MARC21.pm

   1 package C4::AuthoritiesMarc::MARC21;
   2
   3 # Copyright (C) 2007 LibLime
   4 #
   5 # This file is part of Koha.
   6 #
   7 # Koha is free software; you can redistribute it and/or modify it under the
   8 # terms of the GNU General Public License as published by the Free Software
   9 # Foundation; either version 2 of the License, or (at your option) any later
  10 # version.
  11 #
  12 # Koha is distributed in the hope that it will be useful, but WITHOUT ANY
  13 # WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
  14 # A PARTICULAR PURPOSE.  See the GNU General Public License for more details.
  15 #
  16 # You should have received a copy of the GNU General Public License along
  17 # with Koha; if not, write to the Free Software Foundation, Inc.,
  18 # 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  19
  20 use strict;
  21 #use warnings; FIXME - Bug 2505
  22 use MARC::Record;
  23 our $VERSION = 3.00;
  24
  25 =head1 NAME
  26
  27 C4::AuthoritiesMarc::MARC21
  28
  29 =head1 SYNOPSIS
  30
  31 use C4::AuthoritiesMarc::MARC21;
  32
  33 =head1 DESCRIPTION
  34
  35 This is a helper module providing functions used by
  36 C<C4::AuthoritiesMarc> to deal with behavior specific
  37 to MARC21 authority records (as opposed to other
  38 MARC formats).
  39
  40 Functions from this module generally should not be used
  41 directly; instead, use the appropriate function from
  42 C<C4::Authorities> that will dispatch the appropriate
  43 function based on the marcflavour system preference.
  44
  45 =head1 FUNCTIONS
  46
  47 =cut
  48
  49 =head2 get_heading_type_from_marc
  50
  51   my $auth_type = get_auth_type_from_marc($marc);
  52
  53 Given a MARC::Record object containing an authority record,
  54 determine its heading type (e.g., personal name, topical term,
  55 etc.).
  56
  57 =cut
  58
  59 =head2 default_auth_type_location
  60
  61   my ($tag, $subfield) = default_auth_type_location();
  62
  63 Get the tag and subfield used to store the heading type
  64 if not specified in the MARC framework.  For MARC21,
  65 this defaults to 942$a.
  66
  67 =cut
  68
  69 sub default_auth_type_location {
  70     return ('942', 'a');
  71 }
  72
  73 =head2 fix_marc21_auth_type_location
  74
  75   fix_marc21_auth_type_location($auth_marc, $auth_type_tag, $auth_type_subfield);
  76
  77 If the incoming C<MARC::Record> object has a 152$b, remove it.  If no
  78 field already exists that contains the specified C<$auth_type_tag>
  79 and C<$auth_type_subfield>, create a new field whose contents
  80 are the original contents of the 152$b.
  81
  82 This routine exists to deal with a historical problem: MARC21
  83 authority records in previous versions of Koha kept the
  84 authority type in the 152$b.  While the 152 may be OK for UNIMARC,
  85 a 9XX should have been used for MARC21.
  86
  87 This function is meant to be called from GetAuthority, GetAuthorityXML,
  88 and AddAuthority.
  89
  90 FIXME: This function should be removed once it's determined
  91        that no MARC21 users of Koha are using the 152$b
  92        to store the authority type.
  93
  94 =cut
  95
  96 sub fix_marc21_auth_type_location {
  97     my ($auth_marc, $auth_type_tag, $auth_type_subfield) = @_;
  98
  99     my $auth_type_code;
 100     return unless $auth_type_code = $auth_marc->subfield('152', 'b');
 101     $auth_marc->delete_field($auth_marc->field('152'));
 102     unless ($auth_marc->field($auth_type_tag) && $auth_marc->subfield($auth_type_tag, $auth_type_subfield)) {
 103         $auth_marc->add_fields($auth_type_tag,'','', $auth_type_subfield=>$auth_type_code);
 104     }
 105
 106 }
 107
 108 =head1 AUTHOR
 109
 110 Koha Development Team <http://koha-community.org/>
 111
 112 Galen Charlton <galen.charlton@liblime.com>
 113
 114 =cut
 115
 116 1;