diff --git a/src/main/java/org/dcsa/core/validator/ValidationGroups.java b/src/main/java/org/dcsa/core/validator/ValidationGroups.java
new file mode 100644
index 0000000..1508da0
--- /dev/null
+++ b/src/main/java/org/dcsa/core/validator/ValidationGroups.java
@@ -0,0 +1,11 @@
+package org.dcsa.core.validator;
+
+public interface ValidationGroups {
+  interface Create {}
+
+  interface Read {}
+
+  interface Update {}
+
+  interface Delete {}
+}