| |||
| 複合階層 (A set of entities that are conceptually part of a hierarchy, such as a parent entity and a child entity. Data operations require that the entities be treated as a single unit) | |||
| |||
| 複合階層 (A set of entities that are conceptually part of a hierarchy, such as a parent entity and a child entity. Data operations require that the entities be treated as a single unit) | |||
