diff --git a/yaml/office-storey.yaml b/yaml/office-storey.yaml
index 0f45b7c..0198264 100644
--- a/yaml/office-storey.yaml
+++ b/yaml/office-storey.yaml
@@ -1,11 +1,11 @@
 src: ifc/office.ifc
 
 operations:
-  - name: Extract storey UG
+  - name: Extract storey EG
     command: extract
     input: ifc/office.ifc
-    output: ifc/office_storey_UG.ifc
+    output: ifc/office_storey_EG.ifc
     type: IfcBuildingStorey
-    id: UG
+    id: EG
 
-dest: ifc/office_storey_UG.ifc
+dest: ifc/office_storey_EG.ifc