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+[[!if test="enabled(meta)"
+  then="In diesem Wiki ist die Direktive: meta **aktiviert**."
+ else="In diesem Wiki ist die Direktive: meta **nicht aktiv**; falls dies gewünscht wird, den Admin benachrichtigen."]]
+
+---
+The `meta` directive is supplied by the [[!iki plugins/meta desc=meta]] plugin.
+
+This directive 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"]]
+
+The first form sets a given field to a given value, while the second form
+also specifies some additional sub-parameters. You can have only one field
+per `meta` directive, use more directives if you want to specify more fields.
+
+The field values are treated as HTML entity-escaped text, so you can include
+a quote in the text by writing `"` and so on.
+
+## Supported fields
+
+* title
+
+  Overrides the title of the page, which is generally the same as the
+  page name.
+
+  Note that if the title is overridden, a "title_overridden" variable will
+  be set to a true value in the template; this can be used to format things
+  differently in this case.
+
+  An optional `sortas` parameter will be used preferentially when
+  [[ikiwiki/pagespec/sorting]] by `meta(title)`:
+
+	\[[!meta title="The Beatles" sortas="Beatles, The"]]
+
+	\[[!meta title="David Bowie" sortas="Bowie, David"]]
+
+* license
+
+  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.
+
+  An optional `sortas` parameter will be used preferentially when
+  [[ikiwiki/pagespec/sorting]] by `meta(author)`:
+
+	\[[!meta author="Joey Hess" sortas="Hess, Joey"]]
+
+* authorurl
+
+  Specifies an url for the author of a page.
+
+* description
+
+  Specifies a short description for the page. This will be put in
+  the html header, and can also be displayed by eg, the [[map]] directive.
+
+* keywords
+
+  Specifies keywords summarizing the contents of the page. This
+  information will be put in the html header.  Only letters,
+  numbers, spaces and commas are allowed in this string; other
+  characters are stripped.  Note that the majority of search
+  engines, including Google, do not use information from the
+  keywords header.
+
+* permalink
+
+  Specifies a permanent link to the page, if different than the page
+  generated by ikiwiki.
+
+* date
+
+  Specifies the creation date of the page. This creates a 
+  `<meta name="date" content="...">` header in the HTML output, but also
+  modifies the internal `ctime` in the
+  [[!iki tips/inside_dot_ikiwiki desc="internal index"]].
+  The date can be entered in nearly any format, since it's parsed by
+  [[!cpan TimeDate]] but invalid dates yield an error in 3.20180321
+  or later.
+
+* stylesheet
+
+  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"]]
+  
+  However, this will be scrubbed away if the 
+  [[!iki plugins/htmlscrubber desc=htmlscrubber]] plugin is enabled,
+  since it can be used to insert unsafe content.
+
+* script
+
+  Adds a script to a page. The script is treated as a wiki link to
+  a `.js` file in the wiki, so it cannot be used to add links to external
+  scripts. The optional `defer` and `async` keywords can be used to set
+  the corresponding HTML4 and HTML5 script options. Example:
+
+	\[[!meta script=somescript defer async]]
+
+  The tag is subject to scrubbing as with the stylesheet and link fields.
+
+* openid
+
+  Adds html &lt;link&gt; tags to perform OpenID delegation to an external
+  OpenID server. This lets you use an ikiwiki page as your OpenID.
+
+  By default this will delegate for both `openid` and `openid2`. To only
+  delegate for one, add a parameter such as `delegate=openid`.
+
+  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).
+
+  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 &lt;link&gt; tag. For example:
+
+       \[[!meta link="http://joeyh.myopenid.com/" rel="openid.delegate"]]
+
+  However, this latter syntax won't be allowed if the 
+  [[!iki plugins/htmlscrubber desc=htmlscrubber]] plugin is enabled, since it can be used to
+  insert unsafe content.
+
+* enclosure
+
+  Specifies a link to a file to be rendered as an "enclosure" in
+  RSS/Atom feeds (and a plain old link in HTML). Useful for
+  [[!iki podcast desc=podcasting]].
+
+* redir
+
+  Causes the page to redirect to another page in the wiki.
+
+  	\[[!meta redir=otherpage]]
+
+  The default is to redirect without delay.
+  Optionally, a delay (in seconds) can be specified: "delay=10"
+
+  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 
+  [[!iki plugins/htmlscrubber desc=htmlscrubber]] plugin 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 `#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 value is escaped, but its contents are not otherwise checked.
+
+* guid
+
+  Specifies a globally unique ID for a page. This guid should be a URI,
+  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
+  (see [[!iki tips/howto_avoid_flooding_aggregators]]).
+
+* updated
+
+  Specifies a fake modification time for a page, to be output into RSS and
+  Atom feeds. This is useful to avoid flooding aggregators that sort by
+  modification time, like Planet: for instance, when editing an old blog post
+  to add tags, you could set `updated` to be one second later than the original
+  value. The date/time can be given in any format that
+  [[!cpan TimeDate]] can understand, just like the `date` field and maps to the
+  `<meta name="updated" content="...">` HTML header and internal `mtime` field.
+
+* foaf
+
+  Adds a Friend of a Friend ([FOAF](http://wiki.foaf-project.org/w/Autodiscovery))
+  reference to a page.
+
+  Example:
+
+  	\[[!meta foaf=foaf.rdf]]
+
+* name
+
+  Adds a HTML `<meta>` header with this `name` attribute. Its other attributes are
+  taken from the other parameters, so for example
+  `\[[!meta name="foo" content="bar" x-non-standard-attribute="baz"]]`
+  becomes `<meta name="foo" content="bar" x-non-standard-attribute="baz">`. This
+  won't be allowed if the [[!iki plugins/htmlscrubber desc=htmlscrubber]] plugin is enabled,
+  since it can be used to insert unsafe content.
+
+## Other fields
+
+If the field is not one of the above predefined fields, the metadata will be
+written to the generated html page as a &lt;meta&gt; header. For example,
+`\[[!meta foo="bar"]]` becomes `<meta name="foo" content="bar">`. As
+with `name`, this won't be allowed if the [[!iki plugins/htmlscrubber
+desc=htmlscrubber]] plugin is enabled.
+
+This syntax cannot be used for meta headers with unusual names, in
+particular names containing `:` such as `flattr:id` and `twitter:card`.
+Please use `\[[!meta name="..." content="..."]]` for those headers.
+
+[[!meta robots="noindex, follow"]]