...reflect a hierarchical "tree" structure by default, but there's nothing at all to prevent adding secondary links to reflect other notions. The Comics Retcon pages, which have many authors, also have pages with more that one "ancestor" or "descendant."

If you look at the comments below the Comics Retcon title page, you'll find several by me which explain how to do this in detail, as well as a few comments on how other things might be arranged. Want a link to the title page at the beginning of the story? Easily done. Fifty links to fifty stories? Not so hard.

Cheers,

Puddin'

A tender heart is an asset to an editor: it helps us be ruthless in a tactful way.
--- The Chicago Manual of Style