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diff --git a/lib/DBIx/Class/ResultSet.pm b/lib/DBIx/Class/ResultSet.pm
index cdbbd6c..d15696d 100644
--- a/lib/DBIx/Class/ResultSet.pm
+++ b/lib/DBIx/Class/ResultSet.pm
@@ -4366,8 +4366,10 @@ For a more in-depth discussion, see L</PREFETCHING>.
 
 This attribute is a shorthand for specifying a L</join> spec, adding all
 columns from the joined related sources as L</+columns> and setting
-L</collapse> to a true value. For example, the following two queries are
-equivalent:
+L</collapse> to a true value. It can be thought of as a rough B<superset>
+of the L</join> attribute.
+
+For example, the following two queries are equivalent:
 
   my $rs = $schema->resultset('Artist')->search({}, {
     prefetch => { cds => ['genre', 'tracks' ] },