为此，客户机以映射塔的形式提供数据，映射塔作为查询键。
To do this, data is provided by the client in the form of a map tower which serves as a lookup key.
Key path属性是要将其值作为数据库中的查询键使用的消息的位置。
The key path property is the location within the message whose value will be used as a lookup key in the database.
对于这些情况，属性类型是可查询键和值的CompositeData对象。
In these cases, the attribute type is a CompositeData object interrogated for its keys and values.
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