X-Git-Url: http://git.vanrenterghem.biz/git.ikiwiki.info.git/blobdiff_plain/906dcfd518c9597dd68ddf30c28bb68e9cbf8555..bb7e09b7a7aa78b9f46d366343746b485ab426b2:/doc/plugins/meta.mdwn?ds=inline

diff --git a/doc/plugins/meta.mdwn b/doc/plugins/meta.mdwn
index 093766708..506ac84a8 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.
@@ -13,22 +13,7 @@ also specifies some additional sub-parameters.
 The field values are treated as HTML entity-escaped text, so you can include
 a quote in the text by writing `"` and so on.
 
-You can use any field names you like, but here are some predefined ones:
-
-* 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
-  [[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.
+Supported fields:
 
 * title
 
@@ -42,12 +27,12 @@ You can use any field names you like, but here are some predefined ones:
 * license
 
   Specifies a license for the page, for example, "GPL". Can contain
-  WikiLinks.
+  WikiLinks and arbitrary markup.
 
 * copyright
 
   Specifies the copyright of the page, for example, "Copyright 2007 by
-  Joey Hess". Can contain WikiLinks.
+  Joey Hess". Can contain WikiLinks and arbitrary markup.
 
 * author
 
@@ -73,16 +58,82 @@ You can use any field names you like, but here are some predefined ones:
   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).
+
+  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]]
+
+  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/"]]
+
+  However, this latter syntax won't be allowed if the [[htmlscrubber]] is
+  enabled, since it can be used to insert unsafe content.
+
+  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 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.
 
-  	\\[[meta openid="http://joeyh.myopenid.com/"
-	server="http://www.myopenid.com/server"]]
+  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