数据字典视图可以被分为多组。大多数情况下，一组视图由三个包含相似信息的视图构成，其中的区别在于视图名称的前缀。
The data dictionary consists of sets of views. In many cases, a set consists of three views containing similar information and distinguished from each other by their prefixes.
与数据库内的其他数据相同，数据字典也是以表及视图的形式组织的。
The data dictionary is structured in tables and views, just like other database data.
与数据库内的其他数据相同，数据字典也是以表及视图的形式组织的。
The data dictionary is structured in tables and views, just like other database data.
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