Subject Authority Validation Records

"The [Library of Congress] Cataloging Policy and Support Office (CPSO) has begun creating and distributing subject authority records called 'validation records' that represent valid 6XX headings plus subdivision strings (topical, chronological, geographic, and form), including strings with free-floating subdivisions for which subject authority records were previously not made." (Catalogablog)

http://catalogablog.blogspot.com/2007_10_07_archive.html#1992779656103239277#1992779656103239277