# File lib/marc/record.rb, line 68
    def initialize
      @fields = FieldMap.new
      # leader is 24 bytes
      @leader = ' ' * 24
      # leader defaults:
      # http://www.loc.gov/marc/bibliographic/ecbdldrd.html
      @leader[10..11] = '22'
      @leader[20..23] = '4500'
    end