任意字符串值都可以加入资产的自定义属性中；但是，这个值只用于在 RAM 客户端中搜索和查看。

Any string value can be placed in the custom attribute on the asset; however, the value is for searching and view-only purposes in the RAM clients.

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通过预定义的自定义属性查询待处理任务。

Query the to-do task by the predefined custom property.

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添加清单3所示的自定义属性。

Add the custom properties shown in listing 3.

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