> 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/enumerations/natureofaccessvalue.md).

# NatureOfAccessValue

### AccessPoint feature

Defines the values of the form of enforcement to expect at the access point.

| Value                     | Description                                 |
| ------------------------- | ------------------------------------------- |
| Door                      | Access is via a door.                       |
| Gate                      | Access is via a gate.                       |
| Manned Barrier            | Access is via a manned barrier.             |
| Monitored Rising Barriers | Access is via a monitored rising barrier.   |
| Monitored Rising Bollards | Access is via monitored rising bollard(s).  |
| Moveable Barrier          | Access is via a moveable barrier.           |
| Opening                   | Access is through a non-restricted opening. |
| Revolving Door            | Access is via a revolving door.             |
| Rising Barrier            | Access is via a rising barrier.             |
| Rising Bollards           | Access is via rising bollard(s).            |
| Shutter                   | Access is via a shutter.                    |
| Steps                     | Access is via a flight of steps.            |
| Turnstile                 | Access is via a turnstile.                  |
| Unknown                   | Access enforcement is unknown.              |

{% hint style="info" %}
The only value currently populated in OS MasterMap Sites Layer is 'Unknown'; all other values in the table are not currently populated in the product.
{% endhint %}


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