X-Git-Url: http://git.vanrenterghem.biz/git.ikiwiki.info.git/blobdiff_plain/8271e9641e2f2bce9060cecd9a3421e2a4f98f24..e1f66dafca76e69b652b92088632ec2ae0d8e6b7:/doc/plugins/meta.mdwn

diff --git a/doc/plugins/meta.mdwn b/doc/plugins/meta.mdwn
index c3f971d06..506ac84a8 100644
--- a/doc/plugins/meta.mdwn
+++ b/doc/plugins/meta.mdwn
@@ -123,6 +123,18 @@ Supported fields:
   contents. In particular, it does not check the values against the set of
   valid values but serves whatever you pass it.
 
+* guid
+
+  Specifies a globally unique ID for a page. This guid should be a URI
+  (in particular, it can be `urn:uuid:` followed by a UUID, as per
+  [[!rfc 4122]]), and it will be used to identify the page's entry in RSS
+  and Atom feeds. If not given, the default is to use the page's URL as its
+  guid.
+
+  This is mostly useful when a page has moved, to keep the guids for
+  pages unchanged and
+  [[avoid_flooding_aggregators|tips/howto_avoid_flooding_aggregators]].
+
 If the field is not one of the above predefined fields, the metadata will be
 written to the generated html page as a <meta> header. However, this
 won't be allowed if the [[htmlscrubber]] is enabled, since it can be used to