X-Git-Url: http://git.vanrenterghem.biz/git.ikiwiki.info.git/blobdiff_plain/f850acc6ad8a780a6b913df1099b8563647de03d..6bb934fa76e481560891f4e8007445d8178e9deb:/doc/plugins/meta.mdwn

diff --git a/doc/plugins/meta.mdwn b/doc/plugins/meta.mdwn
index 5c3098e56..b1e0cb757 100644
--- a/doc/plugins/meta.mdwn
+++ b/doc/plugins/meta.mdwn
@@ -4,27 +4,16 @@
 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.
 
-You can use any field names you like, but here are some predefined ones:
-
-* link
-
-  Specifies a link to another page. This is used to generate a html
-  <link> tag, and also as a way to make the wiki treat one page as
-  linking to another without displaying a user-visible link. The latter 
-  can be useful when using links to categorise pages. A html link tag
-  would look like this:
-
-	\[[meta link="foo.css" rel="stylesheet" type="text/css"]]
-
-  A non-user-visible [[WikiLink]] would instead look like this:
+The field values are treated as HTML entity-escaped text, so you can include
+a quote in the text by writing `"` and so on.
 
-	\[[meta link=otherpage]]
+Supported fields:
 
 * title
 
@@ -37,12 +26,27 @@ You can use any field names you like, but here are some predefined ones:
 
 * license
 
-  Specifies a copyright license for the page, for example, "GPL".
+  Specifies a license for the page, for example, "GPL". Can contain
+  WikiLinks and arbitrary markup.
+
+* copyright
+
+  Specifies the copyright of the page, for example, "Copyright 2007 by
+  Joey Hess". Can contain WikiLinks and arbitrary markup.
 
 * author
 
   Specifies the author of a page.
 
+* authorurl
+
+  Specifies an url for the author of a page.
+
+* description
+
+  Specifies a "description" of the page. You could use this to provide
+  a summary, for example, to be picked up by the [[map]] plugin.
+
 * permalink
 
   Specifies a permanent link to the page, if different than the page
@@ -53,9 +57,90 @@ You can use any field names you like, but here are some predefined ones:
   Specifies the creation date of the page. The date can be entered in
   nearly any format, since it's parsed by [[cpan TimeDate]].
 
-If the field is not treated specially (as the link and title fields are),
-the metadata will be written to the generated html page as a <meta>
-header.
+* stylesheet
 
-The field value is treated as HTML entity-escaped text, so you can include
-a quote in the text by writing `"` and so on.
+  Adds a stylesheet to a page. The stylesheet is treated as a wiki link to
+  a `.css` file in the wiki, so it cannot be used to add links to external
+  stylesheets. Example:
+
+	\[[!meta stylesheet=somestyle rel="alternate stylesheet"
+	title="somestyle"]]
+
+* openid
+
+  Adds html <link> tags to perform OpenID delegation to an external
+  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.
+
+  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
+insert unsafe content.