| 释义 |
data base descriptionDBD ／VS,the collection of macro parameter statements that describes an IMS／ VS data base.These statements describe the hierarchical structure, IMS／VS organization, device type, segment length, sequence fields, and alternate search fields.The statements are assembled to produce data base description blocks.；在IBM的信息管理系统IMS／VS中,描述IMS／VS数据库的宏参数语句的集合。这些语句描述层次结构、IMS／VS组织、设备类型、段长、顺序字段和替换检索字段。这些语句经汇编后产生数据库描述块。 |