gistfile1.rb

  #
  # Returns a string which represents the time as dateTime defined by XML
  # Schema:
  #
  #   CCYY-MM-DDThh:mm:ssTZD
  #   CCYY-MM-DDThh:mm:ss.sssTZD
  #
  # where TZD is Z or [+-]hh:mm.
  #
  # If self is a UTC time, Z is used as TZD.  [+-]hh:mm is used otherwise.
  #
  # +fractional_seconds+ specifies a number of digits of fractional seconds.
  # Its default value is 0.
  #
  def xmlschema(fraction_digits=0)
    sprintf('%d-%02d-%02dT%02d:%02d:%02d',
      year, mon, day, hour, min, sec) +
    if fraction_digits == 0
      ''  
    elsif fraction_digits <= 6
      '.' + sprintf('%06d', usec)[0, fraction_digits]
    else
      '.' + sprintf('%06d', usec) + '0' * (fraction_digits - 6)
    end +
    if utc?
      'Z' 
    else
      off = utc_offset
      sign = off < 0 ? '-' : '+' 
      sprintf('%s%02d:%02d', sign, *(off.abs / 60).divmod(60))
    end 
  end 
  alias iso8601 xmlschema