The key here is to focus on the "visible" data structure of the systems — i.e., the data structure exposed by the user interface, reports, and data interfaces.
此处的关键是着重于“可见的”系统的数据结构——例如，由用户接口暴露出的数据结构、报告及数据接口。
Default visible columns - The typical user interface of a form contains a grid to display an overview for all data entered.
默认可视列——典型的表单用户界面包含一个网格以显示所有录入数据的概览。
Loose coupling (no metrics and prices are visible in the self-service user interface).
松耦合(自助用户界面中看不到任何指标和价格)。
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