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(-)a/C4/AuthoritiesMarc.pm (-2 / +2 lines)
Lines 1749-1755 sub merge { Link Here
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                if ( exists $controlled_ind->{sub2} ) {    # thesaurus info
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                if ( exists $controlled_ind->{sub2} ) {    # thesaurus info
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                    if ( defined $controlled_ind->{sub2} ) {
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                    if ( defined $controlled_ind->{sub2} ) {
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                        # Add or replace
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                        # Add or replace when not empty. If empty, an existing
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                        # $2 value is retained (see also bug 40119).
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                        if ( $controlled_ind->{sub2} ne q{} ) {
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                        if ( $controlled_ind->{sub2} ne q{} ) {
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                            $field_to->update( 2 => $controlled_ind->{sub2} );
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                            $field_to->update( 2 => $controlled_ind->{sub2} );
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                        }
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                        }
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- 

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