Infinitely deep facet/term combinations
We sometimes wonder whether or not the facet/term combinations should be infinitely deep.
As of right now the facet/term combinations are simple two-dimensional hierarchies. Examples include:
Audience/Freshman
Audience/Sophomore
Audience/Junior
Tools/Dictionaries
Tools/Catalogs
Tools/Indexes
Formats/Books
Formats/Journals
Formats/Movies
These two-dimensional hierarchies work, most of the time, but what do you do when it comes to subjects? This works just fine, as far as it goes:
Subjects/Astronomy
Subjects/Mathematics
Subjects/Literature
Subjects/Music
To make a subjects hierarchy […]