NAME

Catmandu::Fix::Bind::mab_each - a binder that loops over MAB2 fields

SYNOPSIS

# Only add field 331 to the title when field 412 matches 'Heise'
do mab_each()
    if mab_match("412","Heise")
        mab_map("331",title)
    end
end

# Delete all the 700 subject fields
do mab_each()
    if mab_match("700",".*")
        reject()
    end
end

DESCRIPTION

The mab_each binder will iterate over each individual MAB2 field and execute the fixes only in context over each individual field.

If a MAB2 record contains:

705    $a775.05$c775
705    $a702.08$c702

then the fix

do mab_each()
    mab_map("705a",subject.$append)
end

will have the same effect as

mab_map("705a",subject.$append)

because mab_map by default loops over all repeated MAB2 fields. But the mab_each bind has the advantage to process fields in context. E.g. to only map fields where the subfield $c doesn't contain '702' you can write:

do mab_each()
    unless mab_match("705","702")
        mab_map("705",subject.$append)
    end
end

SEE ALSO

Catmandu::Fix::Bind

AUTHOR

Johann Rolschewski <jorol@cpan.org>

COPYRIGHT AND LICENSE

This software is copyright (c) 2013 by Johann Rolschewski.

This is free software; you can redistribute it and/or modify it under the same terms as the Perl 5 programming language system itself.