An interesting if rather academic article: FAST (FACETED APPLICATION OF SUBJECT
TERMINOLOGY): A SIMPLIFIED LCSH-BASED VOCABULARY

"With the phenomenal growth of electronic resources and the emergence of numerous
metadata schemes for their description, there is a need, particularly, for subject access
methods that can handle a large volume of materials without incurring the same amount
of effort and cost as in the treatment of traditional library materials."

and this means facets!