# Payload

Data product contains payload which is a collection of [data points](/terms/data-point.md). 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](broken://pages/-M1_YBQfrwrq4V4L275y#data-product-payload-responses)

![](/files/-Lzlj-9jihv3-vLGWq9F)

### Three payload data collection types

Payload of data products have fixed schemas defined in ontology ([examples](broken://pages/-M1_YBQfrwrq4V4L275y#data-product-payload-responses)). 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)


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