diff --git a/src/main/java/com/r35157/libs/valuetypes/basic/Id.java b/src/main/java/com/r35157/libs/valuetypes/basic/Id.java
new file mode 100644
index 0000000..a8d1b09
--- /dev/null
+++ b/src/main/java/com/r35157/libs/valuetypes/basic/Id.java
@@ -0,0 +1,6 @@
+package com.r35157.libs.valuetypes.basic;
+
+/**
+ * Id is the super tag for all kinds of id value types.
+ */
+public interface Id {}