abbr. DSN
misc. data set name
这会打开一个面板，指定要从这个系统浏览、编辑或者创建的数据集名。
A panel opens specifying the data set names for browsing, editing, or creating from this system.
High Level Qualifier 作为前缀添加到数据集名中。
The High Level Qualifier is added as a prefix to the data set name.
数据集名级别是自动用图7中所示的MVS User ID字段中指定的值填充的。
The data set name level is automatically filled in with the value specified in the MVS User ID field shown in Figure 7.
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