How about a plugin providing a
-[[preprocessor_directive|ikiwiki/preprocessordirective]] to render a
-[[debpkg graphviz]] file as an image via one of the graphviz programs
+[[preprocessor_directive|ikiwiki/directive]] to render a
+[[!debpkg graphviz]] file as an image via one of the graphviz programs
("dot" by default) and include the resulting image on the page, using the
"cmapx" image map format? graphviz files themselves could also render the
same way into an HTML file with the same basename as the graphviz file;