[MarkLogic Dev General] Influence relevancy on a term not used in the search phrase

[Mattio Valentino]

I have a set of documents that are keyword searchable in MarkLogic.
They each have the year of publication set, e.g. <year>1972</year>.

I've been asked if I can influence the relevancy of the search results
based on the year of publication even if it wasn't used in the search
by the user.  The desired effect is that documents published recently
rank higher than documents published 30 years ago.

The only obvious way I can think to do this is by using document
quality.  Is there another approach?

Thanks,
Matt