> 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/areas-and-zones-portfolio/code-point/code-point-getting-started-guide/data-structure.md).

# Data structure

## CSV <a href="#id-2.5.1-csv" id="id-2.5.1-csv"></a>

There are two folders in the root directory: **Doc** and **Data**.

The **Doc** folder contains the following files:

* CD\_INFO.TXT – Note about the data on this DVD.
* Codelist.xls – Lookup table of GSS Codes.
* NHS\_Codelist.xls – Lookup table of Health GSS Codes.
* metadata.txt – Number of postcode units in each postcode area.
* Readfirst.txt – Summary of copyright, licence and data format information.
* DISCCARE.TXT – Contains information on the care of DVDs

The **Data** folder contains the following sub-folder:

* CSV: 121 Postcode area files in CSV format

## GeoPackage <a href="#id-2.5.2-geopackage" id="id-2.5.2-geopackage"></a>

There are two folders in the root directory: **Doc** and **Data**.

The **Doc** folder contains the following files:

* Codelist.xls – Lookup table of GSS Codes.
* metadata.txt – Number of postcode units in each postcode area.
* NHS\_Codelist.xls – Lookup table of Health GSS Codes.
* Readfirst.txt – Summary of copyright, licence and data format information

The **Data** folder contains the following file:

* UK\_CODEPOINT.gpkg – One postcode area file in GeoPackage format

## Available formats <a href="#id-2.6-available-formats" id="id-2.6-available-formats"></a>

### CSV <a href="#id-2.6.1-csv" id="id-2.6.1-csv"></a>

The structure of Code-Point supplied in CSV is described in the product Technical specification included below.

### GeoPackage <a href="#id-2.6.2-geopackage" id="id-2.6.2-geopackage"></a>

The structure of Code-Point supplied in GeoPackage is described in the product's [Technical Specification](/os-downloads/products/areas-and-zones-portfolio/code-point/code-point-technical-specification.md).

### CSV header file <a href="#id-3.-csv-header-file" id="id-3.-csv-header-file"></a>

The header file, required for use with the CSV format, can be downloaded from the [Code-Point Downloads page](/os-downloads/products/areas-and-zones-portfolio/code-point/code-point-downloads.md).

This header file contains two rows of data:

* Header codes
* Header descriptive names


---

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