MARC::File::MARCXML - MARCXML implementation for MARC records
SYNOPSIS
use MARC::File::MARCXML;
my $file = MARC::File::MARCXML->in( $filename );
while ( my $marc = $file->next() ) { # Do something } $file->close();
undef $file;
EXPORT
None.
METHODS
decode( $string [, \&filter_func ] )
Constructor for handling data from a MARCXML file. This function takes care of
all the tag directory parsing & mangling.
Any warnings or coercions can be checked in the C<warnings()> function.
The C<$filter_func> is an optional reference to a user-supplied function
that determines on a tag-by-tag basis if you want the tag passed to it
to be put into the MARC record. The function is passed the tag number
and the raw tag data, and must return a boolean. The return of a true
value tells MARC::File::MARCXML::decode that the tag should get put into
the resulting MARC record.
For example, if you only want title and subject tags in your MARC record,
try this:
my $marc = MARC::File::MARCXML->decode( $string, \&filter );
Why would you want to do such a thing? The big reason is that creating
fields is processor-intensive, and if your program is doing read-only
data analysis and needs to be as fast as possible, you can save time by
not creating fields that you'll be ignoring anyway.
Another possible use is if you're only interested in printing certain
tags from the record, then you can filter them when you read from disc
and not have to delete unwanted tags yourself.
encode()
Returns a string of characters suitable for writing out to a MARCXML file
RELATED MODULES
MARC::Record
TODO
Make some sort of autodispatch so that you don't have to explicitly
specify the MARC::File::X subclass, sort of like how DBI knows to use
DBD::Oracle or DBD::Mysql.
Create a toggle-able option to check inside the field data for end of
field characters. Presumably it would be good to have it turned on all
the time, but it's nice to be able to opt out if you don't want to take
the performance hit.
LICENSE
Copyright (c) 2011-2014, 2016 University Of Helsinki (The National
Library Of Finland)
This project's source code is licensed under the terms of GNU General
Public License Version 3.
