code: def default_chunker(text, getreffs):
      
      level = len(text.citation)
      return [tuple([reff.split(":")[-1]]*2) for reff in getreffs(level=level)]
docs: This is the default chunker which will resolve the reference giving a callback (getreffs) and a text object with its metadata
  
      :param text: Text Object representing either an edition or a translation
      :type text: MyCapytains.resources.inventory.Text
      :param getreffs: callback function which retrieves a list of references
      :type getreffs: function
  
      :return: List of urn references with their human readable version
      :rtype: [(str, str)]