def to_model
      rm = range ? range.to_model : nil
      HQMF::TemporalReference.new(type, reference.to_model, rm)
    end
def to_model
      rm = range ? range.to_model : nil
      HQMF::TemporalReference.new(type, reference.to_model, rm)
    end
Generates this classes hqmf-model equivalent