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=head1 NAME
MARC::MIR::Tutorial - Tutorial for MARC::MIR DSL
=head2 the DSL
to make things more readable and less error prone, we also add a DSL. Every keywords of this DSL works the same way. FIXME : explain.
also, iso2709_records_of is an helper that stream the records of an ISO2709 formatted file.
=head2 some examples
the perfect boilerplate
use autodie;
use Modern::Perl;
use Perlude;
use MARC::MIR;
print all the ids of the records (assuming the id is in 001, the common case)
now { say record_id from_iso2709 } iso2709_records_of "biblio.marc";
or
marawk { say $ID } "biblio.marc";
remove every 9.. fields
now {
$_ = from_iso2709;
with_fields { @$_ = grep { (tag) !~ /^9/ } @$_ };
print to_iso2709;
} iso2709_records_of "biblio.marc";
every 856$q must be jpeg
now {
$_ = from_iso2709;
map_fields {
tag eq '856' and map_subfields {
(tag) eq 'z' and with_value { $_ = 'jpeg' }
}
}
with_fields { @$_ = grep_fields { (tag) !~ /^9/ } @$_ };
} iso2709_records_of "biblio.marc";
or
marawk { map_values { $_ = 'jpeg' } [qw< 856 z >] } "biblio.marc"
collect every 856$z by id
use Modern::Perl;
use YAML;
use MARC::MIR;
my %seen;
marawk {
map_values { push @{ $seen{$ID} }, $_ } [qw< 856 z >]
} "data/*.RAW";
say YAML::Dump \%seen;
=head2 marawk
# TODO:
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