I'm glad that you found the LC Best Practices guidelines useful. I'd like to let you know that the guidelines are now available at, where the revised content should be more readable and navigable (and, as you note, there is a PDF version available for printing). This is part of the site redesign of, which describes implementation of EAD for LC collections, as distinguished from the official site, which is maintained by the Network and Mark Standards Office of LC in partnership with SAA. 
Thanks for checking us out!

Mary Lacy
Manuscript Division
Library of Congress
Washington DC 20540-4682
fax 202-707-6336
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>>> "Karen D. Miller" <[log in to unmask]> 10/23/2008 3:13 PM >>>
I found a list of recommended source attributes for <controlaccess>
subelements for names in the LC Best Practices guidelines: 
and, indeed, the recommended attribute for Library of Congress Authority
Files is "lcnaf". There is also a list of attributes for sources for subject
headings on this page, under section  Section, the general
overview for <controlaccess> gives a fuller list:
aat, cdwa, dot, gmgpc, lcnaf, lcsh, lctgm, local, mesh, mim, ncarules, nmc,
rbgenr, tgn, ulan
The Best Practices guidelines are difficult to navigate to on the LC site;
I've had this one bookmarked for a long time, but when I tried to navigate
to it, I had to use the search box at But there is a pdf
version dated 2008 at 
Best regards,
Karen D. Miller
Monographic/Digital Projects Cataloger
Northwestern University Library
Evanston, IL
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From: Encoded Archival Description List [mailto:[log in to unmask]] On Behalf Of
Joyce Chapman
Sent: Thursday, October 23, 2008 1:43 PM
To: [log in to unmask] 
Subject: Re: Not very good question about corpname
I'm pretty sure it's: source="lcnaf"

That stands for, "Library of Congress Authority Files."

Joyce Chapman
On Thu, Oct 23, 2008 at 2:29 PM, Randi Knutson <[log in to unmask]> wrote:
I am sorry, but I just cannot find this information anywhere, and our
archivist doesn't know either.  For the attribute source in corpname, if it
is the LOC Online Catalog, what is the code I should use for source?

This actually illustrates the hardest part of creating a finding aid, at
least for me.  The online docs do a great job of explaining what the
elements are, but gloss over what the allowable attributes are....
/end non-archivist opinion

Thanks in advance, and sorry for the lame question.....