Stateful Extracting useful information from unstructured data often requires machine learning. SensorBee works well with online machine learning algorithms by storing machine learning models as user-defined states. It supports various machine learning toolkits, including Chainer and some components of Jubatus. In addition, SensorBee’s query language enables stateful temporal data handling. Express
![SensorBee: An open source stream processing engine for IoT](https://cdn-ak-scissors.b.st-hatena.com/image/square/709c91b11622ceb89ffa026fdb873ef03bf52891/height=288;version=1;width=512/http%3A%2F%2Fsensorbee.io%2Fimages%2Ficon.png)