Clarify union types

tom-tan · tom-tan · commit bf9182ca2beb · 2023-07-22T15:15:57.000Z
diff --git a/schema_salad/metaschema/metaschema_base.yml b/schema_salad/metaschema/metaschema_base.yml
@@ -91,7 +91,9 @@ $graph:
         typeDSL: true
         refScope: 2
       doc: |
-        The field type
+        The field type. If it is an array, it indicates
+        that the field type is a union type of its elements.
+        Its elements may be duplicated.
 
 
 - name: RecordSchema
