Since early 2007, the Library of Congress has been developing Library of Congress Genre/Form Terms for Library and Archival Materials (LCGFT), whose terms describe what something is rather than what it is about, as subject headings do. In March 2015 the Policy and Standards Division (PSD) will approve approximately 390 genre/form terms for literary works.
The Library of Congress Subject Headings (LCSH) is perhaps the most widely adopted subject indexing language in the world, has been translated into many languages, and is used around the world by libraries large and small. LCSH has been actively maintained since 1898 to catalog materials held at the Library of Congress. Proposals for additions and changes are reviewed regularly at staff meetings in the Policy and Standards Division (PSD) and an approved list is published.