为实现印刷数字资产库中文件的高效管理和快速检索，根据印刷数字资产库对文件管理及检索的纵横需求，建立了一套三级编目方法及相应的编码规则。经过对分类检索与逐一检索对应的检索量进行比较，证实了三级编目能够有效提高文件的管理检索效率。

In order to realize the effective document management and searching, the vertical and horizontal function requirement of print digital assets database was analyzed. A three levels cataloguing method and coding rule were created. The assortative searching was compared with the one-by-one searching and it was proved that the three levels catalogue can increase the document management and searching efficiency.