+# Variable parameters of a route path can be specified using the `:` prefix:
+#
+# ~~~nitish
+# var iface = "http://localhost:3000"
+# var vh = new VirtualHost(iface)
+# vh.routes.add new Route("/blog/articles/:articleId", new BlogArticleAction)
+# ~~~
+#
+# Route arguments can be accessed from the `HttpRequest` within a nitcorn `Action`:
+#
+# ~~~nitish
+# class BlogArticleAction
+# super Action
+#
+# redef fun answer(request, url) do
+# var param = request.param("articleId")
+# if param == null then
+# return new HttpResponse(400)
+# end
+#
+# print url # let's say "/blog/articles/12"
+# print param # 12
+#
+# return new HttpResponse(200)
+# end
+# end
+# ~~~