Merge branch 'schema-notes' into 'main'

Note on ordering and default initialization

See merge request preserves/preserves!5

preserves-schema.md

@@ -231,6 +231,11 @@ pattern - one that matches a string, symbol, number or boolean:
                / Ref
                / LiteralPattern  -- with a side condition
 
+A host language will likely use the same ordering of its types as
+specified by the schema. It is therefore recommended to specify first
+the alternative best suited as a default initialization value (if
+there is any).
+
 ### Intersection definitions.
 
     AndPattern = NamedPattern "&" NamedPattern *("&" NamedPattern)