# Displaying and Editing Data Source Information
## Displaying Data Source Information
To view the information for a data source (DS), open the menu 
associated with the desired DS and select **View Information**. The interface consists of two tabs: **Information** and **Attributes**.
### **Information** Tab
This tab displays general details about the data source:
* **Name** and **description**
* **References**: projects, layers, and/or tables using this data source
* Associated **tags**
For **spatial DS**, an interactive map is displayed:
* A dotted outline indicates the geographic extent of the DS
* The base map is provided by OpenStreetMap
* Digital Elevation Models (DEM) from GeoTIFF files are shown in grayscale
Additional technical information is also displayed:
* **DS identifier** (click 
to copy to clipboard)
* **Unique identifier** within JMap Cloud
* **Coordinate Reference System (CRS)**
* **Total number of elements** in the DS
For **tabular DS**, a navigable data table is shown, along with:
* The number of loaded rows
* The **total number of records** in the table
### **Attributes** Tab
This tab lists all **attributes** (or fields) of the DS. For each attribute, three sections are available:
* **Settings**: title, data type, and indexing status for quick search
* **Statistics**: value statistics (depending on the attribute type)
* **Value Domain**: displays the current domain (if any), or allows you to create one
#### **Value Domain**
A **value domain** defines the valid set (finite or infinite) of values that an attribute can take—typically for text or numeric fields.
**To create 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 the value and its label.
4. Click 
to save or 
to cancel.
5. Repeat to add additional values.
You can:
* Remove a value that is not present in the data by clicking the  icon
* Delete the entire domain by clicking **Delete Value Domain**
## Editing Parameter Values
**You can modify some parameters:**
1. If you have edit permissions for the DS, when you hover over the Description, Labels, and Unique identifier (SDS) parameters, the icon 
appears, allowing you to edit the parameter.
2. Also, if you have edit permissions, you can edit attribute/field titles, index them (by checking the box Indexed), and create, modify, or delete a value domain for text or quantitative attributes.
3. Press 
or to save or discard changes.
{% hint style="info" %}
Only indexed attributes can be used in simple searches (searching for elements in a project's layers based on attribute values) in the NG application.
{% endhint %}
## Editing Parameters
If you have editing permissions on the DS, you can modify certain parameters directly in the interface:
* Hovering over the **Description**, **Tags**, or **Unique Identifier** (for spatial DS) displays the icon, allowing you to make edits
* You can also:
* Edit **attribute titles**
* Toggle **indexing**
* **Create, modify, or delete** value domains (for text or numeric attributes)
Click to save or to cancel your changes.
{% hint style="info" %}
Only **indexed attributes** can be used in **simple searches** within the JMap NG mapping application (i.e., searching for features in layers based on attribute values).
{% endhint %}