- In IMS/VS, a data base access method used for indexed access to records in a hierarchic direct organization. It provides indexed access to the root segments and pointer access to subordinate segments. A HIDAM index can be constructed with ISAM and OSAM or VSAM.; 虛擬存儲(chǔ)信息管理系統(tǒng)(IMS/VS)中的一種數(shù)據(jù)庫(kù)存取方法,用于對(duì)分層直接結(jié)構(gòu)中的記錄進(jìn)行索引存取。這種存取法對(duì)根段提 供索引存取,而對(duì)從屬段提供指針存取。用索引順序存取方法和溢出順序存取方法 (OSAM)或虛擬存儲(chǔ)存取方法(VSAM)可以建立分層索引直接存取方法的索引。參閱hierarchic direct access method。
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