71. 对于本构成部分而言，随着文件转移逐步取得进展而出现的经验教训是，准备各种复杂形式的大量数字化档案以转移到数字化保存系统的工作是非常复杂的。数字化档案的容量约为 3 千万亿字节，包括各种标准文本、图像和音像形式以及更复杂的电子邮件、网站和数据库形式。到目前为止，向数字化保存系统的转移主要集中在不太复杂的形式上。显然，在转移更复杂的形式之前，需要为其进行更复杂的准备工作，包括评估、元数据获取和打包。本构成部分将吸取经验教训，从电子邮件和网站开始，启动对复杂形式进行数字化存档的必要准备工作，以此扩大数字化保存方案的侧重点。
71. The lesson for the component, which emerged as the transfer of files progressed, was the complexity of preparing large volumes of digital archives in a variety of complex formats for transfer into the digital preservation system. The volume of the digital archives is approximately 3 petabytes, comprising a wide variety of standard text, image and audiovisual formats, as well as more complex email, website and database formats. To date, transfer to the digital preservation system has been focused on the less complex formats, and it has become apparent that more sophisticated preparatory work, including appraisal, metadata capture and packaging, is required for the more complex formats before they can be transferred. In applying the lesson, the component will expand the focus of the digital preservation programme by initiating the necessary preparatory work for digitally archiving complex formats, starting with email and websites.