1 package C4::AuthoritiesMarc::MARC21;
3 # Copyright (C) 2007 LibLime
5 # This file is part of Koha.
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.
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.
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>.
24 C4::AuthoritiesMarc::MARC21
28 use C4::AuthoritiesMarc::MARC21;
32 This is a helper module providing functions used by
33 C<C4::AuthoritiesMarc> to deal with behavior specific
34 to MARC21 authority records (as opposed to other
37 Functions from this module generally should not be used
38 directly; instead, use the appropriate function from
39 C<C4::Authorities> that will dispatch the appropriate
40 function based on the marcflavour system preference.
46 =head2 get_heading_type_from_marc
48 my $auth_type = get_auth_type_from_marc($marc);
50 Given a MARC::Record object containing an authority record,
51 determine its heading type (e.g., personal name, topical term,
56 =head2 default_auth_type_location
58 my ($tag, $subfield) = default_auth_type_location();
60 Get the tag and subfield used to store the heading type
61 if not specified in the MARC framework. For MARC21,
62 this defaults to 942$a.
66 sub default_auth_type_location {
70 =head2 fix_marc21_auth_type_location
72 fix_marc21_auth_type_location($auth_marc, $auth_type_tag, $auth_type_subfield);
74 If the incoming C<MARC::Record> object has a 152$b, remove it. If no
75 field already exists that contains the specified C<$auth_type_tag>
76 and C<$auth_type_subfield>, create a new field whose contents
77 are the original contents of the 152$b.
79 This routine exists to deal with a historical problem: MARC21
80 authority records in previous versions of Koha kept the
81 authority type in the 152$b. While the 152 may be OK for UNIMARC,
82 a 9XX should have been used for MARC21.
84 This function is meant to be called from GetAuthority, GetAuthorityXML,
87 FIXME: This function should be removed once it's determined
88 that no MARC21 users of Koha are using the 152$b
89 to store the authority type.
93 sub fix_marc21_auth_type_location {
94 my ($auth_marc, $auth_type_tag, $auth_type_subfield) = @_;
97 return unless $auth_type_code = $auth_marc->subfield('152', 'b');
98 $auth_marc->delete_field($auth_marc->field('152'));
99 unless ($auth_marc->field($auth_type_tag) && $auth_marc->subfield($auth_type_tag, $auth_type_subfield)) {
100 $auth_marc->add_fields($auth_type_tag,'','', $auth_type_subfield=>$auth_type_code);
107 Koha Development Team <http://koha-community.org/>
109 Galen Charlton <galen.charlton@liblime.com>