diff --git a/packages/core/client/src/schema-component/common/utils/logic.js b/packages/core/client/src/schema-component/common/utils/logic.js
index 57236334d..fd3f84a61 100644
--- a/packages/core/client/src/schema-component/common/utils/logic.js
+++ b/packages/core/client/src/schema-component/common/utils/logic.js
@@ -65,12 +65,18 @@ http://ricostacruz.com/cheatsheets/umdjs.html
     $lte: function (a, b, c) {
       return c === undefined ? a <= b : a <= b && b <= c;
     },
+    $exists: function (a) {
+      return jsonLogic.truthy(a);
+    },
     $notEmpty: function (a) {
       return jsonLogic.truthy(a);
     },
     $empty: function (a) {
       return !jsonLogic.truthy(a);
     },
+    $notExists: function (a) {
+      return !jsonLogic.truthy(a);
+    },
     '%': function (a, b) {
       return a % b;
     },