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 Modern::Perl;
  21 use MARC::Record;
  22
  23 =head1 NAME
  24
  25 C4::AuthoritiesMarc::MARC21
  26
  27 =head1 SYNOPSIS
  28
  29 use C4::AuthoritiesMarc::MARC21;
  30
  31 =head1 DESCRIPTION
  32
  33 This is a helper module providing functions used by
  34 C<C4::AuthoritiesMarc> to deal with behavior specific
  35 to MARC21 authority records (as opposed to other
  36 MARC formats).
  37
  38 Functions from this module generally should not be used
  39 directly; instead, use the appropriate function from
  40 C<C4::Authorities> that will dispatch the appropriate
  41 function based on the marcflavour system preference.
  42
  43 =head1 FUNCTIONS
  44
  45 =cut
  46
  47 =head2 get_heading_type_from_marc
  48
  49   my $auth_type = get_auth_type_from_marc($marc);
  50
  51 Given a MARC::Record object containing an authority record,
  52 determine its heading type (e.g., personal name, topical term,
  53 etc.).
  54
  55 =cut
  56
  57 =head2 default_auth_type_location
  58
  59   my ($tag, $subfield) = default_auth_type_location();
  60
  61 Get the tag and subfield used to store the heading type
  62 if not specified in the MARC framework.  For MARC21,
  63 this defaults to 942$a.
  64
  65 =cut
  66
  67 sub default_auth_type_location {
  68     return ('942', 'a');
  69 }
  70
  71 =head2 fix_marc21_auth_type_location
  72
  73   fix_marc21_auth_type_location($auth_marc, $auth_type_tag, $auth_type_subfield);
  74
  75 If the incoming C<MARC::Record> object has a 152$b, remove it.  If no
  76 field already exists that contains the specified C<$auth_type_tag>
  77 and C<$auth_type_subfield>, create a new field whose contents
  78 are the original contents of the 152$b.
  79
  80 This routine exists to deal with a historical problem: MARC21
  81 authority records in previous versions of Koha kept the
  82 authority type in the 152$b.  While the 152 may be OK for UNIMARC,
  83 a 9XX should have been used for MARC21.
  84
  85 This function is meant to be called from GetAuthority, GetAuthorityXML,
  86 and AddAuthority.
  87
  88 FIXME: This function should be removed once it's determined
  89        that no MARC21 users of Koha are using the 152$b
  90        to store the authority type.
  91
  92 =cut
  93
  94 sub fix_marc21_auth_type_location {
  95     my ($auth_marc, $auth_type_tag, $auth_type_subfield) = @_;
  96
  97     my $auth_type_code;
  98     return unless $auth_type_code = $auth_marc->subfield('152', 'b');
  99     $auth_marc->delete_field($auth_marc->field('152'));
 100     unless ($auth_marc->field($auth_type_tag) && $auth_marc->subfield($auth_type_tag, $auth_type_subfield)) {
 101         $auth_marc->add_fields($auth_type_tag,'','', $auth_type_subfield=>$auth_type_code);
 102     }
 103
 104 }
 105
 106 =head1 AUTHOR
 107
 108 Koha Development Team <http://koha-community.org/>
 109
 110 Galen Charlton <galen.charlton@liblime.com>
 111
 112 =cut
 113
 114 1;