def build_dataset_attributes_json_object(output_files, container_name, num_files, num_multi_page,
                                         percentage_multi_page):
    """

    :param output_files: The files to output
    :param container_name: The storage container name
    :param num_files: The number of files processed
    :param num_multi_page: The number of multi-page forms
    :param percentage_multi_page: The % of forms that are multi-page
    :return: The output files object
    """
    output_files[container_name].append({
        'numberInvoices': num_files,
        'numMultipage': num_multi_page,
        'percentageMultipage': percentage_multi_page
    })

    return output_files