diff --git a/tools/sdbusplus/schemas/events.schema.yaml b/tools/sdbusplus/schemas/events.schema.yaml
index 0d5573f..d0af09b 100644
--- a/tools/sdbusplus/schemas/events.schema.yaml
+++ b/tools/sdbusplus/schemas/events.schema.yaml
@@ -105,11 +105,13 @@
         properties:
             redfish-mapping:
                 type: string
-                description:
-                    Used when a `sdbusplus` event should map to a specific
-                    Redfish Message rather than a generated one. This is useful
-                    when an internal error has an analog in a standardized
-                    registry.
+                pattern: "^[A-Z_][a-zA-Z0-9_]*(\\.[A-Z_][a-zA-Z0-9_]*)*$"
+                description: Used when a `sdbusplus` event should map to a
+                    specific Redfish Message rather than a generated one. This
+                    is useful when an internal error has an analog in a
+                    standardized registry.
+
+                    When specifying these, the version should be omitted.
         required:
             - redfish-mapping