From a Core Blog Post:
The ALA Core SAC Subcommittee on Faceted Vocabularies (SSFV) is proud to announce the completion of the first version of a new resource entitled Retrospective Implementation of Library of Congress Faceted Vocabularies: Best Practices for Librarians and Programmers.
This resource (several years in the making) describes a set of best practices for implementers wishing to apply LC faceted vocabularies–using purpose-built fields in the MARC 21 bibliographic format–retrospectively to library catalogs, utilizing automated and semi-automated processes. It is also intended to serve as an ever-growing hub of information for all matters related to retrospective implementation of LC faceted vocabularies, including efforts undertaken by specialist communities of practice, library consortia/cooperatives, library systems vendors, etc. Lastly, it articulates a “roadmap” for ongoing work by SSFV and allied communities of practice.