+commit filter::
+ This filter is given no arguments. The commit message text that is to
+ be filtered is available on standard input and the filtered text is
+ expected on standard output.
+
+email filter::
+ This filter is given two parameters: the email address of the relevant
+ author and a string indicating the originating page. The filter will
+ then receive the text string to format on standard input and is
+ expected to write to standard output the formatted text to be included
+ in the page.
+
+owner filter::
+ This filter is given no arguments. The owner text is available on
+ standard input and the filter is expected to write to standard
+ output. The output is included in the Owner column.
+
+source filter::
+ This filter is given a single parameter: the filename of the source
+ file to filter. The filter can use the filename to determine (for
+ example) the syntax highlighting mode. The contents of the source
+ file that is to be filtered is available on standard input and the
+ filtered contents is expected on standard output.
+