This is because a flow designer USES promotion to control the setting of a property value in a hierarchical composition.

这是因为流设计人员是使用升级来控制分级结构中的特性值的设置。

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Adding an ORDER siblings BY clause which is only allowed in composition with the hierarchical query clause and will return the siblings in the predefined sequence.

添加一个ORDER SIBLINGS BY子句，该子句只能与分级查询子句组合使用，并且将按预先定义的顺序返回同级查询结果。

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Additionally, BLA architecture supports recursive composition by reference, facilitating hierarchical assembly of BLAs and individual deployed artifacts.

此外，BLA体系结构支持按引用的递归组合，从而促进BLA和各个所部署构件的层次结构组装。

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