diff --git a/schema/schema.prs b/schema/schema.prs
index 2ed14d8..cdba44b 100644
--- a/schema/schema.prs
+++ b/schema/schema.prs
@@ -17,6 +17,11 @@ Definitions = { symbol: Definition ...:... }.
 
 ; Pattern / Pattern / ...
 ; and the empty pattern is <or []>
+;
+; TODO: refactor to be
+; <or [@pattern NamedAlternative @patterns NamedAlternative ...]> / Alternative .
+; Similarly for <and...>
+;
 Definition = <or [@patterns NamedAlternative ...]> / Alternative .
 
 NamedAlternative = [@variantLabel string @alternative Alternative].