> For the complete documentation index, see [llms.txt](https://docs.os.uk/os-downloads/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.os.uk/os-downloads/products/addresses-and-names-portfolio/os-open-uprn/os-open-uprn-technical-specification.md).

# OS Open UPRN Technical Specification

This technical specification provides detailed technical information about OS Open UPRN. It is targeted at technical users and software developers.

## Product overview

OS Open UPRN is an open dataset that contains the position of each record held within [AddressBase Premium](/os-downloads/products/addresses-and-names-portfolio/addressbase-premium.md) along with the unique identifier – the Unique Property Reference Number (UPRN).

The product allows users to link and associate datasets by using either the UPRN or the position of the address point. It is designed to bridge the gap between disparate data sets and enable the wider adoption of the UPRN to encourage greater data sharing.

This data is usable in a GIS application and can also be integrated into a spatial database.

<figure><img src="https://1897589978-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FcNpJpLP8RROUaWVQo5ea%2Fuploads%2FyjujVPXGarXyuGRpSwgR%2Fopen_uprn_datahub_2_large.png?alt=media&amp;token=417b0048-9d76-4ca4-915f-bddcbb067c85" alt="Representation of OS Open UPRN data against a background map. Four UPRN records have been highlighted." width="563"><figcaption><p>Representation of OS Open UPRN data against a background map.</p></figcaption></figure>

## Index

This technical specification includes the following section:

* [Feature types](/os-downloads/products/addresses-and-names-portfolio/os-open-uprn/os-open-uprn-technical-specification/feature-type.md)

{% hint style="info" %}
The [OS Open UPRN Overview](/os-downloads/products/addresses-and-names-portfolio/os-open-uprn/os-open-uprn-overview.md) details what coordinate reference system is used by OS Open UPRN and gives product supply information (including the available format, supply mechanism, coverage and currency).
{% endhint %}


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