术语 | selfindexed file |
释义 | selfindexed file 自索引文件;[自索引档案] A sequential file in which records are placed in fixedlength, numbered locations in which there is a direct relationship between key number and location number, for example, the location number could be determined by dividing the key by a constant. The algorithm is, typically, selected so that there is a onetoone relationship between keys and locations so storage space is wasted whereveritems are missing from the sequence. 一种顺序文件,其中记录以固定的长度并按编号地址存放,键号和地址号之间有直接的对应关系,例如地址号可由键除以一个常数得到。 算法的选择使得键与地址之间具有一一对应的关系,所以,无论从序列中什么地方删去 项目,存储空间均遭浪费。 |
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