diff --git a/src/main/resources/swagger.api/schemas/entityTypeColumn.json b/src/main/resources/swagger.api/schemas/entityTypeColumn.json
index 7b8895e..8261c71 100644
--- a/src/main/resources/swagger.api/schemas/entityTypeColumn.json
+++ b/src/main/resources/swagger.api/schemas/entityTypeColumn.json
@@ -29,6 +29,10 @@
           "description": "Indicates if the field is hidden in UI",
           "type": "boolean",
           "default": false
+        },
+        "essential": {
+          "description": "Indicates if a column is crucial to the definition of an entity type",
+          "type": "boolean"
         }
       },
       "required": []
diff --git a/src/main/resources/swagger.api/schemas/entityTypeSource.json b/src/main/resources/swagger.api/schemas/entityTypeSource.json
index c833997..001a5f0 100644
--- a/src/main/resources/swagger.api/schemas/entityTypeSource.json
+++ b/src/main/resources/swagger.api/schemas/entityTypeSource.json
@@ -31,6 +31,10 @@
     "useIdColumns": {
       "description": "Whether to use the idColumns of this source as idColumns for the enclosing entity type",
       "type": "boolean"
+    },
+    "essentialOnly": {
+      "description": "Indicates that only critical columns for core functionality should be inherited, excluding non-essential columns",
+      "type": "boolean"
     }
   },
   "required": [