diff --git a/README.md b/README.md
index 9e404b5..b909c29 100644
--- a/README.md
+++ b/README.md
@@ -5,6 +5,8 @@ This repository contains examples of [openPMD](http://www.openpmd.org/#/start) d
 - 3D Cartesian
 - Cylindrical with azimuthal decomposition ("thetaMode")
 
+The `structure.h5` is an openPMD 1.1.0 compliant file contains the bare bones structure with no associated data.
+
 In order to obtain these datasets:
 - Clone this repository
 ```
diff --git a/structure.h5 b/structure.h5
new file mode 100644
index 0000000..b2edd1b
Binary files /dev/null and b/structure.h5 differ