Was Feature 90004 and 90041 on the ISFDB wiki. "When a Long Works list includes series data (one or more novels in a series), it displays all levels of the series hierarchy, e.g. "Terminator (top level series); Terminator 2 (lower level series); T2: Infiltrator (novel title)". However, when you click on a lower level series, it gives you a list of titles that belong to it, but it doesn't show which higher level series it is a part of. Wouldn't it be better if it did? Ahasuerus 13:15, 2 May 2006 (CDT)"
"Series pages do not show the names of their parent series and it seems the only way to discover the parent series names this are to edit the series or to click on an author’s name and then look for the title (or series name) on the author’s page. For example, if I’m on the Star Trek Bantam page I can click on Joe Haldeman and find that Star Trek Bantam is sub-series of Star Trek The Original Series which in turn is a sub-series of Star Trek Universe. Marc Kupper 02:04, 29 Nov 2006 (CST)"
Anonymous
I think I have a handle on this: see http://www.isfdb.org/wiki/index.php/ISFDB:Community_Portal#Series_parent_display
biblio/pe.py 1.3 committed to add a "Sub-series of " link at beginning of list where appropriate.
Implemented in r2009-03.