[[!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 <link> tags to perform OpenID delegation to an external
value. The date/time can be given in any format that
[[!cpan TimeDate]] can understand, just like the `date` 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]]
+
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 [[!iki plugins/htmlscrubber desc=htmlscrubber]] plugin is enabled,