Update data-validation.md

docs/configuration/data-validation.md

@@ -96,6 +96,7 @@ The following colors are supported:
 
 This is a mapping of models to [custom validators](../customization/custom-validation.md) against which an object is evaluated immediately prior to its deletion. If validation fails, the object is not deleted. An example is provided below:
 
+Example prevents the deletion of a site entry:
 ```python
 PROTECTION_RULES = {
     "dcim.site": [
@@ -108,3 +109,29 @@ PROTECTION_RULES = {
     ]
 }
 ```
+
+### Configuration via Web UI
+Example prevents the deletion of a device entry:
+
+```python
+{
+    "dcim.device": [
+        {
+            "status": {
+                "eq": "decommissioning"
+            }
+        }
+    ]
+}
+
+![image](https://github.com/netbox-community/netbox/assets/46369917/6fb69ab8-1f13-4b86-b84c-ce697af8f679)
+```
+
+If you navigate to a device, rack or site, you will find the path in the top right-hand corner:
+
+![image](https://github.com/netbox-community/netbox/assets/46369917/3f1c8f12-0714-4590-99d7-41ef5da7c1c3)
+
+Examples:
+- dcim.device
+- dcim.site
+- dcim.rack