External plugins are standalone, executable programs, that can be written
in any language. When ikiwiki starts up, it runs the program, and
-communicates with it using XML RPC. If you want to [[write]] an external
+communicates with it using [XML RPC][xmlrpc]. If you want to [[write]] an external
plugin, read on..
+[xmlrpc]: http://www.xmlrpc.com/
+
ikiwiki contains one sample external plugin, named `externaldemo`. This is
written in perl, but is intended to be an example of how to write an
external plugin in your favorite programming language. Wow us at how much