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marc is a ruby library for reading and writing MAchine Readable Cataloging (MARC). More information about MARC can be found at http://www.loc.gov/marc.

Usage

require 'marc'

# reading records from a batch file
reader = MARC::Reader.new('marc.dat', :external_encoding => "MARC-8")
for record in reader
  # print out field 245 subfield a
  puts record['245']['a']
end

# creating a record 
record = MARC::Record.new()
record.append(MARC::DataField.new('100', '0',  ' ', ['a', 'John Doe']))

# writing a record
writer = MARC::Writer.new('marc.dat')
writer.write(record)
writer.close()

# writing a record as XML
writer = MARC::XMLWriter.new('marc.xml')
writer.write(record)
writer.close()

# encoding a record
MARC::Writer.encode(record) # or record.to_marc

MARC::Record provides #to_hash and #from_hash implementations that deal in ruby hash's that are compatible with the marc-in-json serialization format. You are responsible for serializing the hash to/from JSON yourself.

Installation

gem install marc

Or if you're using bundler, add to your Gemfile

gem 'marc'

Character Encodings in 'binary' ISO-2709 MARC

The Marc binary (ISO 2709) Reader (MARC::Reader) has some features for helping you deal with character encodings in ruby 1.9. It is always recommended to supply an explicit :externalencoding option to MARC::Reader; either any valid ruby encoding, _or the string "MARC-8". MARC-8 input will by default be transcoded to a UTF-8 internal representation.

MARC::Reader does not currently have any facilities for guessing encoding from MARC21 leader byte 9, that is ignored.

Consult the MARC::Reader class docs for a more complete discussion and range of options.

The MARC binary Writer (MARC::Writer) does not have any encoding-related features -- it's up to you the developer to make sure you create MARC::Records with consistent and expected char encodings, although MARC::Writer will write out a legal ISO 2709 either way, it just might have corrupted encodings.

Miscellany

Source code at: https://github.com/ruby-marc/ruby-marc/

Find generated API docs at: http://rubydoc.info/gems/marc/frames

Run automated tests in source with rake test.

Developers, release new version of gem to rubygems with rake release (bundler-supplied task). Note that one nice thing this will do is automatically tag the version in git, very important for later figuring out what's going on.

Please send bugs, requests and comments to Code4Lib Mailing list (https://listserv.nd.edu/cgi-bin/wa?A0=CODE4LIB).

Authors

Kevin Clarke ksclarke@gmail.com Bill Dueber bill@dueber.com William Groppe will.groppe@gmail.com Ross Singer rossfsinger@gmail.com Ed Summers ehs@pobox.com