> 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](https://142262255-files.gitbook.io/~/files/v0/b/gitbook-legacy-files/o/assets%2F-MAQARG1mep5UziFxS9K%2F-MAQk1kMkLAMqdEe-zUK%2F-MAQlD_eRlgSlmgv3GBq%2FDataset%20Statistics.jpg?alt=media\&token=89efd612-5291-48c9-bd91-b35a537432e0)

![Browsing the values in an element](https://142262255-files.gitbook.io/~/files/v0/b/gitbook-legacy-files/o/assets%2F-MAQARG1mep5UziFxS9K%2F-MAQk1kMkLAMqdEe-zUK%2F-MAQlZTSL7gJMuxEhBDr%2FBrowsing%20the%20values.jpg?alt=media\&token=ce13159d-a047-4fe1-8f69-d8feb6b0d2c2)