A set of data that describes a document stored in the library. The description includes the document’s name,data type,password,share status,location in the source data set,date stored,version numbers,and to what class and cluster it is assigned,etc.; 描述庫中存放的文件的一組數(shù)據(jù),這種描述包括:文獻(xiàn)名、數(shù)據(jù)類型、口令、共享狀態(tài)、 在源數(shù)據(jù)集中的位置、存儲(chǔ)日期、版本號(hào)以及它所在的類和族,等等。