Initial work on #10244: Protection rules (#14097)

docs/configuration/data-validation.md

@@ -87,3 +87,24 @@ The following colors are supported:
 * `gray`
 * `black`
 * `white`
+
+---
+
+## PROTECTION_RULES
+
+!!! tip "Dynamic Configuration Parameter"
+
+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:
+
+```python
+PROTECTION_RULES = {
+    "dcim.site": [
+        {
+            "status": {
+                "eq": "decommissioning"
+            }
+        },
+        "my_plugin.validators.Validator1",
+    ]
+}
+```