Short simple script to split a multi products ONIX file into many single product ONIX files

onix_split.rb

require 'nokogiri'

filename = './input.xml'

doc = Nokogiri::XML(File.open(filename))
header = doc.css('Header')
products = doc.css('Product')

products.each do |product|
  res = Nokogiri::XML::Document.new
  onix_message = res.add_child(Nokogiri::XML::DocumentFragment.parse('<ONIXMessage xmlns="http://www.editeur.org/onix/3.0/reference" release="3.0">'))
  onix_message.add_child(header)
  onix_message.add_child(product)

  output_filename = product.css('RecordReference').text + '.xml'

  File.write(output_filename, res.to_xml)
end