> For the complete documentation index, see [llms.txt](https://carare.gitbook.io/mint-mapping-service/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://carare.gitbook.io/mint-mapping-service/importing-metadata/dataset-statistics.md).

# Dataset statistics

Before starting a mapping, it can be very helpful to look at the statistics for your dataset. The statistics show:

* the names of all the elements in your dataset
* whether they have been used (the count)
* whether the values are distinct or not (elements with unique values have a count that matches the number of distinct values and are displayed in green)
* the average length (or number of characters) in an element

By clicking on the name of an element you can also view the data in this element.

![Dataset statistics](/files/-MAQlD_eRlgSlmgv3GBq)

![Browsing the values in an element](/files/-MAQlZTSL7gJMuxEhBDr)