diff --git a/src/main/java/org/gcube/informationsystem/model/annotation/Abstract.java b/src/main/java/org/gcube/informationsystem/model/annotation/Abstract.java
new file mode 100644
index 0000000..64e69c3
--- /dev/null
+++ b/src/main/java/org/gcube/informationsystem/model/annotation/Abstract.java
@@ -0,0 +1,12 @@
+package org.gcube.informationsystem.model.annotation;
+
+import java.lang.annotation.ElementType;
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+import java.lang.annotation.Target;
+
+@Target(ElementType.TYPE)
+@Retention(RetentionPolicy.RUNTIME)
+public @interface Abstract {
+
+}