# AddressBase Supply Set

This feature is formally known as the GML feature collection and is used to define a collection of features.

{% hint style="info" %}
This is not supplied as part of the CSV supply. Please see [Model Overview CSV](https://docs.os.uk/os-downloads/products/addresses-and-names-portfolio/addressbase/addressbase-structure#id-2.1.1_model_overview_csv) and [Model Overview GML](https://docs.os.uk/os-downloads/products/addresses-and-names-portfolio/addressbase/addressbase-structure#id-2.1.2_model_overview_gml) for more information.
{% endhint %}

## Feature type attributes <a href="#feature-type-attributes" id="feature-type-attributes"></a>

The following sub-sections provide details about the attributes included with this feature, their data types in the different output formats, and other important metadata about them.

### Query time

Time the data was extracted from the database.

* **Attribute Name**: queryTime (GML), Not provided (CSV)
* **Data Type:** DateTime (GML)
* **Multiplicity:** \[1]
* **Size**: 1

### Query change since date

The date given as part of a change-only query.

* **Attribute Name**: queryChangeSinceDate (GML), Not provided (CSV)
* **Data Type:** Date (GML)
* **Multiplicity:** \[1]
* **Size**: 1