old_contents: '''
  Created on 02/02/2014
  
  @author: Miguel Otero
  '''
  
  from .time import Time
  
  
  class Interval(Time):
      '''
      classdocs
      '''
      MONTHLY = "http://purl.org/linked-data/sdmx/2009/code#freq-M"
      YEARLY = "http://purl.org/linked-data/sdmx/2009/code#freq-A"
  
      def __init__(self, frequency = YEARLY, start_time=None, end_time=None):
          '''
          Constructor
          '''
          self.frequency = frequency
          self.start_time = start_time
          self.end_time = end_time
      
      def get_time_string(self):
          return str(self.start_time) + '-' + str(self.end_time)
new_contents: '''
  Created on 02/02/2014
  
  @author: Miguel Otero
  '''
  
  from .time import Time
  
  
  class Interval(Time):
      '''
      classdocs
      '''
      MONTHLY = "freq-M"
      YEARLY = "freq-A"
  
      def __init__(self, frequency=YEARLY, start_time=None, end_time=None):
          '''
          Constructor
          '''
          self.frequency = frequency
          self.start_time = start_time
          self.end_time = end_time
      
      def get_time_string(self):
          return str(self.start_time) + '-' + str(self.end_time)
subject: Remove ontology reference in Interval frequency value