In VAX DBMS,the file of machine-language instructions that describes the physical structure of the database and provides buffer space for database pages.; 在VAX系統(tǒng)的數(shù)據(jù)庫(kù)管理系統(tǒng)中,一種機(jī)器語(yǔ)言指令文件,描述數(shù)據(jù)庫(kù)的物理結(jié)構(gòu),并為數(shù) 據(jù)庫(kù)頁(yè)提供緩沖區(qū)。