1引言随着信息化程度的不断推进和无纸化办公的深入应用,在中央和国家机关的业务应用信息系统中迅速积累了海量的信息资源。尽管信息载体不同,数据类型各异,加工程度参差,但这些以数字文件形式存在的信息资源大多承载着国 1 Introduction With the continuous promotion of information technology and the in-depth application of paperless office, massive information resources have been rapidly accumulated in the business application information system of central and state organs. Although different information carriers, different types of data, the degree of processing varies, but most of these information resources exist in the form of digital documents carrying the country