The changes of the data model of one tenant can be made directly to its specific database/tables without impact to other tenants.

租户可以直接对自己的数据库/模式修改数据模型，不会影响其他租户。

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Impact analysis to find out which functions in cleansing or transformation routines would be impacted if a data model is changed.

通过影响分析了解在数据模型发生变化时，会影响清理和转换例程中的哪些功能。

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Modeling Product as a meta-class makes our model more flexible in that adding additional Products to the Catalog is purely a data-driven process and doesn't impact the class model.

将其他Product添加到Catalog完全是一个数据驱动过程，而且不会对类模型产生影响，因此将Product建模为一个元类会使我们的模型更加灵活。

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