# Attributes Tab

This tab presents the attributes or fields specific to the data source, as well as attributes added through relationships with other data sources.

#### Sections

For each attribute, the following sections are displayed:

* **Parameters**: title in each language, data type, and indexing status for fast search.
* **Statistics**: statistical information about the attribute values (depending on type).
* **Value Domain**: displays the associated value domain (if one exists) or allows you to create a value domain for the attribute.

Attributes added by relationship are displayed in the **Relationships** section, which indicates the source data source (DS) from which the attribute originates and the linking attributes between the two DS.

{% hint style="info" %}
Only indexed attributes can be used in simple searches in the JMap NG mapping application (searching for features based on attribute values).
{% endhint %}

## Value Domain

You can create a value domain for each attribute or field of a vector or non-spatial data source. You can also modify or delete it.

A value domain represents the (finite or infinite) set of admissible values for an attribute or field of type text or numeric (integer or float).

The value domain contains a label (in French, English, or Spanish) for each value of the attribute or field. It can also contain labels for EMPTY and NULL values.

When the data source is updated, new values are automatically added to the value domain.

**Creating a value domain**:

1. Click **Create Value Domain**. The **Value** and **Label** columns appear. All values present in the data are automatically added.
2. Click **+** to add a row.
3. Enter a value and a label.
4. Click the ✓ icon to save, or ✗ to cancel.
5. Repeat to add other values.

{% hint style="info" %}
The **Enter** and **Tab** keys can be used to speed up the entry of a large number of values.
{% endhint %}

You can:

* Delete a value that is not present in the data using the delete icon.
* Delete the entire domain using the **Delete Value Domain** button.

## Adding Attributes by Relationship

An attribute added by relationship can be used like any other attribute when configuring layers.

To add attributes by relationship, you must first configure the relationships between the data source and the target data sources in the [Relationships](/en/jmap-cloud-portal/user-guide-for-jmap-cloud-portal/integrating-data-data-sources/managing-data-sources/viewing-and-editing-data-source-information/relationships-tab.md) tab.

Once the relationships are configured, to add an attribute:

1. Click **+** to display the addition configuration interface.
2. Select the relationship from which to add the attributes.
3. Select the attributes to add by checking them in the dropdown list.
4. Click **Add**. The attributes are displayed in the **Attributes by Relationship** section. You cannot modify the characteristics of an attribute added by relationship.
5. To remove an attribute added by relationship, hover over it until the delete icon appears and click it. The attribute disappears from the tab.


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