This tool also provides all nine diagram types, diagram export, XML Metadata Interchange (XMI) integration, and Object Constraint Language (OCL) support.

该工具还提供了所有九种图表类型、图表导出、XM l元数据交换(XMI)集成，并且支持对象约束语言(ocl)。

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Select the column to which the constraint applies in Server Explorer, Database Diagram Designer, or Table Designer.

在服务器资源管理器、数据库关系图设计器或表设计器中选择应用该约束的列。

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Considering arranging train paths as arranging a periodic event, in virtue of the periodic constraint graph and the periodic tension model, the periodic train diagram network model is established.

将安排列车运行线的问题看作周期事件安排问题，并借助周期约束图及周期势差模型，可以建立周期运行图网络模型。

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