# Apollo Datasets

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An Apollo license is required to use Apollo Datasets on the DNAnexus Platform. Org approval may also be required. [Contact DNAnexus Sales](mailto:sales@dnanexus.com) for more information.
{% endhint %}

An Apollo Dataset is a DNAnexus [record](https://documentation.dnanexus.com/developer/api/introduction-to-data-object-classes/records) of type `dataset`. It contains both data and metadata, and describes how logical data structures (such as phenotypes and genotypes) relate to the physical layout of the underlying databases.

You can use a Dataset to combine different data types—such as phenotypic, clinical, genomic, or transcriptomic data—across multiple databases into a single, linked, and documented object. Each Dataset record also stores provenance information about how it was created.

This structure makes it easier to:

* Reuse data in the same or different experiments
* Model and share multi-omic datasets
* Scale to large projects (such as TCGA or UKB)
* Maintain data linkages and annotations for reproducibility
* Build tools using a predictable, well-documented framework

Example uses of a Dataset include:

* [Cohort Browser](https://documentation.dnanexus.com/user/cohort-browser)
* [Apollo apps](https://documentation.dnanexus.com/user/spark/apollo-apps)
* [Jupyter Notebooks](https://documentation.dnanexus.com/user/jupyter-notebooks/quickstart)


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