> 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/land-and-terrain-portfolio/os-mastermap-sites-layer/os-mastermap-sites-layer-technical-specification/code-lists/functionthemevalue.md).

# FunctionThemeValue

### FunctionalSite feature

Defines the values for the different functional site themes captured in the data.

More details on each code can be found on the [theme definitions](/os-downloads/products/land-and-terrain-portfolio/os-mastermap-sites-layer/os-mastermap-sites-layer-technical-specification/theme-definitions.md) page.

This will evolve with changes to the capture specification.

| Code                  | Description                                    |
| --------------------- | ---------------------------------------------- |
| Air Transport         | Sites used for air transport.                  |
| Education             | Sites used for education.                      |
| Medical Care          | Sites used for medical care.                   |
| Rail Transport        | Sites used for rail transport.                 |
| Road Transport        | Sites used for road transport.                 |
| Water Transport       | Sites used for water transport.                |
| Utility or Industrial | Sites used for utility or industrial purposes. |


---

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