diff --git a/src/JuliaFEM.jl b/src/JuliaFEM.jl
index 5317cd5..6b2b004 100644
--- a/src/JuliaFEM.jl
+++ b/src/JuliaFEM.jl
@@ -1,6 +1,15 @@
+# This file is a part of JuliaFEM. License is MIT: https://github.com/ovainola/JuliaFEM/blob/master/README.md
 module JuliaFEM
 
 # package code goes here
+type Node
+    node_id
+    coords
+end
+type Element
+    element_id
+    node_ids
+end
 function test()
     return 1
 end