X-Git-Url: http://git.vanrenterghem.biz/git.ikiwiki.info.git/blobdiff_plain/b31e8c08260b0da95014caea078f3155d4707e28..ca30d95a78ca974c040c152b8c31bdd63f219e6b:/doc/plugins/meta.mdwn

diff --git a/doc/plugins/meta.mdwn b/doc/plugins/meta.mdwn
index ec4348e41..12240422d 100644
--- a/doc/plugins/meta.mdwn
+++ b/doc/plugins/meta.mdwn
@@ -4,8 +4,8 @@
 This plugin allows inserting arbitrary metadata into the source of a page.
 Enter the metadata as follows:
 
-	\[[meta field="value"]]
-	\[[meta field="value" param="value" param="value"]]
+	\[[!meta field="value"]]
+	\[[!meta field="value" param="value" param="value"]]
 
 The first form sets a given field to a given value, while the second form
 also specifies some additional sub-parameters.
@@ -58,29 +58,49 @@ Supported fields:
   a `.css` file in the wiki, so it cannot be used to add links to external
   stylesheets. Example:
 
-	\[[meta stylesheet=somestyle rel="alternate stylesheet"
+	\[[!meta stylesheet=somestyle rel="alternate stylesheet"
 	title="somestyle"]]
 
 * openid
 
   Adds html <link> tags to perform OpenID delegation to an external
-  OpenID server. This lets you use an ikiwiki page as your OpenID. Example:
+  OpenID server (for `openid` and `openid2`). An optional `xrds-location`
+  parameter lets you specify the location of any [eXtensible Resource
+  DescriptorS](http://www.windley.com/archives/2007/05/using_xrds.shtml).
 
-  	\\[[meta openid="http://joeyh.myopenid.com/"
-	server="http://www.myopenid.com/server"]]
+  This lets you use an ikiwiki page as your OpenID. Example:
+
+	\\[[!meta openid="http://joeyh.myopenid.com/"
+	server="http://www.myopenid.com/server"
+	xrds-location="http://www.myopenid.com/xrds?username=joeyh.myopenid.com""]]
+
+* link
+
+  Specifies a link to another page. This can be used as a way to make the
+  wiki treat one page as linking to another without displaying a user-visible
+  [[ikiwiki/WikiLink]]:
+
+       \[[!meta link=otherpage]]
+
+  It can also be used to insert a html <link> tag. For example:
+
+       \[[!meta link="http://joeyh.myopenid.com/" rel="openid.delegate"]]
+
+  However, this latter syntax won't be allowed if the [[htmlscrubber]] is
+  enabled, since it can be used to insert unsafe content.
 
 * redir
 
   Causes the page to redirect to another page in the wiki.
 
-  	\[[meta redir=otherpage]]
+  	\[[!meta redir=otherpage]]
 
   Optionally, a delay (in seconds) can be specified. The default is to
   redirect without delay.
 
   It can also be used to redirect to an external url. For example:
 
-  	\[[meta redir="http://example.com/"]]
+  	\[[!meta redir="http://example.com/"]]
 
   However, this latter syntax won't be allowed if the [[htmlscrubber]] is
   enabled, since it can be used to insert unsafe content.
@@ -88,6 +108,34 @@ Supported fields:
   For both cases, an anchor to jump to inside the destination page may also be
   specified using the common `PAGE#ANCHOR` syntax.
 
+* robots
+
+  Causes the robots meta tag to be written:
+
+        \[[!meta robots="index, nofollow"]]
+
+  Valid values for the attribute are: "index", "noindex", "follow", and
+  "nofollow". Multiple comma-separated values are allowed, but obviously only
+  some combinations make sense. If there is no robots meta tag, "index,
+  follow" is used as the default.
+
+  The plugin escapes the value, but otherwise does not care about its
+  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 will be used,
+  rather than the page url, to identify the page in RSS and Atom feeds.
+
+  The guid can either be a uuid (ie,
+  "ec248d04-f347-4eb8-92b6-671b15d36980"), or it can be an alternative URL
+  for the page.
+
+  This is mostly useful when a page's feed has moved, to keep the guids for
+  pages unchanged and
+  [[avoid_flooding_aggregators|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