diff --git a/pkg/KFData/Copyable.go b/pkg/KFData/Copyable.go
new file mode 100644
index 0000000..360f5ed
--- /dev/null
+++ b/pkg/KFData/Copyable.go
@@ -0,0 +1,5 @@
+package KFData
+
+type Copyable interface {
+	Copy() Copyable
+}