Set up data constraints.

设置数据约束。

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If the user enters data that violates any of the data constraints, the XForms-enabled browser can immediately provide feedback to the user.

如果用户输入的数据违反了任何数据约束，支持X Forms的浏览器会立即给用户以反馈。

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In the XForms model, XFG generated data constraints as XForms bind attributes which correspond to database metadata, such as column type, length, required, and so on.

在XForms模型中，xfg生成xforms绑定属性形式的数据约束，它与数据库元数据相对应，比如列类型、长度、是否是必需的，等等。

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The field of data science is emerging to discover the laws that govern this species of data, while cloud computing is quickly eliminating constraints on data accumulation and storage.

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The mobile industry will need to take the initiative to begin aggregating content and optimizing delivery from data-heavy social media apps to ease network constraints and maintain superior user experiences.

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Anyhow, execution of successive IGCP projects (321, 411, 516) targeted at geological evolution of (mainly East and South) Asia and other related researches have contributed much in working out more constraints on the evolution of the Tethys and to provide more data for interpretation.

UNESCO: EARTH SCIENCES FOR SOCIETY