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