Ikiwiki's backend RCS support is also pluggable, so support for new
revision control systems can be added to ikiwiki.
+The standard language for ikiwiki plugins is perl, but ikiwiki also supports
+[[plugins/write/external]] plugins: Standalone programs that can be written in
+any language and communicate with ikiwiki using XML RPC.
+
## [[todo/utf8]]
After rather a lot of fiddling, we think that ikiwiki correctly and fully