# Payload

Data product contains payload which is a collection of [data points](https://dataproduct.oftrust.net/terms/data-point). 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. [See examples](https://dataproduct.oftrust.net/terms/broken-reference)

![](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)

### Three payload data collection types

Payload of data products have fixed schemas defined in ontology ([examples](https://dataproduct.oftrust.net/terms/broken-reference)). Payload can contain three data streams or value sets: 

1. Current values (array of objects)
2. History (array of objects)
3. Prediction (array of objects)