diff --git a/org/open_power/Host.errors.yaml b/org/open_power/Host.errors.yaml
new file mode 100644
index 0000000..ab3df62
--- /dev/null
+++ b/org/open_power/Host.errors.yaml
@@ -0,0 +1,5 @@
+- name: Event
+  description: A host system event was received
+
+- name: MaintenanceProcedure
+  description: A host system event with a procedure callout