# Features - GML

Each feature with the `AdministrativeUnit:FeatureCollection` is encapsulated in the following member element according to its feature type:

| Member Element  | Feature Type         |
| --------------- | -------------------- |
| `<base:member>` | `AdministrativeUnit` |

The `Admin_Unit_ID` of the feature is provided in the XML attribute of the `gml:id`:

{% code overflow="wrap" %}

```xml
<base:member>
<au:AdministrativeUnit gml:id="osgb7000000000017971">
………………………………..
</au:AdministrativeUnit>
</base:member>
```

{% endcode %}