+The contents of the [[templatebody]] directive are used as the
+template. Anything outside that directive is not included in the template,
+and is usually used as documentation describing the template.
+
+If the template does not contain a [[templatebody]] directive, the entire
+source of the page is used for the template. This is deprecated, because
+it leads to the template markup being interpreted as ordinary
+page source when the page is built, as well as being used as the template.