属性一旦与程序实体关联，就可以在运行时查询它，并且可以以各种方式使用(例如，帮助文档)。

Once associated with a program entity, an attribute can be queried at run time and used in any number of ways (for example, help documentation).

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属性是与任何服务描述实体 (Service Description Entity) 关联的简单名/值对。

Properties are simple name/value pairs that are associated with any of the Service Description Entities.

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实体类型可以定义在数据模型中表示关联的导航属性。

Entity types can define navigation properties that represent associations in the data model.

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