历史记录
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History of API/Document Change
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* 2016-01-22: V3.0, Draft
* 2016-01-22: V3.01, enrich daily usage report definition
* 2016-01-22: V3.02, enrich devices, datastreams, datapoints' definitions    
* 2016-02-11: V3.03, migrate to sphinx documentation
* 2016-06-21: V3.05, update format for content tree
* 2016-07-05: V3.06, add more examples in legacy API page
* 2016-10-12: V3.07, update for RESTful API with custom HMAC algorithm

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History of IoT Device Cloud
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Dawn的设备云经历了多个发展阶段：

* 网络存储阶段
* 整合型网站阶段
* 设备云与应用分离阶段
* 量产压测阶段

:doc:`../index`