# Data point

Data point is a single fact or piece of information. In the context of **building management systems** (BMS) data often is gathered with various types of sensors. In the data product context each sensor is a data point source (device in ontology). 

**Each device is not a data product.** Data product contains [payload](https://dataproduct.oftrust.net/terms/payload) which is a collection of data points. Of course there is possible situation that building includes just one CO2 measuring device and the data points of that device constitute [data product payload](https://dataproduct.oftrust.net/terms/payload).

![](https://3709257585-files.gitbook.io/~/files/v0/b/gitbook-legacy-files/o/assets%2F-Ly065p5FE998hsbJRu3%2F-LzlBREooIzM_6_BpKd0%2F-Lzlj-9jihv3-vLGWq9F%2Fpayload\(1\).jpg?alt=media\&token=b57aed1c-1da8-4a07-8288-09c97e4a357f)