# Points of Interest Technical Specification

The Points of Interest product is a comprehensive location-based directory of all public and privately-owned businesses, educational institutions and leisure services in Britain. It contains over four million records, sourced and quality-checked from over a hundred leading listing suppliers. It’s updated four times a year, so you’ll always be working with current information.

## Media formats

Points of Interest customer orders are currently supplied via secure URL. The current size of a full supply is about 1 Gb.

## Glossary

The product [Glossary](/os-downloads/products/addresses-and-names-portfolio/points-of-interest/points-of-interest-overview/glossary.md) contains definitions and terms applicable to this product.

## Feedback

Ordnance Survey welcomes all feedback. If you have any comments or require further information, please make contact using the details above.

## Index

This technical specification includes the following sections:

* [Using Points of Interest](/os-downloads/products/addresses-and-names-portfolio/points-of-interest/points-of-interest-technical-specification/using-points-of-interest.md)
* [Pipe delimited text (PDT) file format](/os-downloads/products/addresses-and-names-portfolio/points-of-interest/points-of-interest-technical-specification/pipe-delimited-text-pdt-file-format.md)
* [Code lists](/os-downloads/products/addresses-and-names-portfolio/points-of-interest/points-of-interest-technical-specification/code-lists.md)
* [Example records](/os-downloads/products/addresses-and-names-portfolio/points-of-interest/points-of-interest-technical-specification/example-records.md)
* [Glossary](/os-downloads/products/addresses-and-names-portfolio/points-of-interest/points-of-interest-technical-specification/glossary.md)


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Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
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```

The question should be specific, self-contained, and written in natural language.
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Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.