From an email:
As part of its ongoing effort to provide effective access to library materials, the Library of Congress is developing a new vocabulary, entitled Library of Congress Demographic Group Terms (LCDGT). This vocabulary will be used to describe the creators of, and contributors to, resources, and also the intended audience of resources. It will be created and maintained by the Policy and Standards Division, and be distinct from the other vocabularies that are maintained by that division: Library of Congress Subject Headings (LCSH), Library of Congress Genre/Form Terms for Library and Archival Materials (LCGFT), and the Library of Congress Medium of Performance Thesaurus for Music (LCMPT).
A general rationale for the development of LCDGT, information about the pilot vocabulary, and a link to the Tentative List of terms in the pilot may be found on LC’s Acquisitions and Bibliographic Access website at http://www.loc.gov/catdir/cpso/lcdgt-announcement.html.
The Policy and Standards Division is accepting comments on the pilot vocabulary and the principles guiding its development through June 5, 2015. Comments may be sent to Janis L. Young at email@example.com.
A follow-up question to this post asked:
Is there a list of the codes used in field 072 in these lists? Some I can figure out, but it would be nice to see a list of the categories you’re using.
The list in question is: DEMOGRAPHIC GROUP TERMS.
To which Adam Schiff replied:
The list of codes is in http://www.loc.gov/catdir/cpso/lcdgt-principles.pdf and online at http://www.loc.gov/standards/valuelist/lcdgt.html (although the latter is still lacking a few of the codes found in the former).