+
+> I think that you're looking for this:
+>
+> `pages="((Topic*/* or Topic*) and ./*) or (Topic* and ! Topic*/*)"`
+>
+> Let's pull that [[PageSpec]] apart.
+>
+> * `(Topic*/* or Topic*)` matches all pages that are underneath a Topic
+> page or are a topic page themselves.
+> * `and ./*` further adds the limitation that the pages have to be
+> in the same directory as the page that is displaying the map. So,
+> for `Topic_A/Page_1`, it will match `Topic_A/*`; for `Topic_A`,
+> it will match `Topic_*` but not subpages.
+> * Finally, `Topic* and ! Topic*/*` matches all the toplevel topic pages,
+> since we always want those to show up.
+>
+> I haven't tested that this works or displays, but I hope it gets you
+> on the right track. PS, be aware of
+> [[this_sidebar_issue|todo/Post-compilation_inclusion_of_the_sidebar]]!
+> --[[Joey]]
+
+>> Thanks, but this assumes that topic pages are named `Topic<something>`.
+>> They aren't. They are tagged with `\[[!meta link="/topic"]]`, and as
+>> far as I can tell there is no [[PageSpec]] notation for "subpages of a
+>> page that satisfies link(foo)"...
+>> -- Zack
+
+>>> I think that the ideas and code in
+>>> [[todo/tracking_bugs_with_dependencies]] might also handle this case.
+>>> --[[Joey]]