document internal here (was already documented in plugins/aggregate)

diff --git a/doc/ikiwiki/directive/aggregate.mdwn b/doc/ikiwiki/directive/aggregate.mdwn
index 70174f44068d528deb003a186b661399c77c9275..ddfcd40b79edfa4678e6a8a1c5b08fb9b9251634 100644 (file)
--- a/doc/ikiwiki/directive/aggregate.mdwn
+++ b/doc/ikiwiki/directive/aggregate.mdwn
@@ -19,6 +19,11 @@ more aggregated feeds. For example:
 
        \[[!inline pages="internal(example/*)"]]
 
 
        \[[!inline pages="internal(example/*)"]]
 

+Note the use of `internal()` in the [[ikiwiki/PageSpec]] to match
+aggregated pages. By default, aggregated pages are internal pages,
+which prevents them from showing up directly in the wiki, and so this
+special [[PageSpec]] is needed to match them.
+

 ## usage
 
 Here are descriptions of all the supported parameters to the `aggregate`
 ## usage
 
 Here are descriptions of all the supported parameters to the `aggregate`