Another way most taggers don't think in terms of LCSH is precoordinated strings. Using FAST with auto suggest and complete might be something to consider. 

David Bigwood
Lunar and Planetary Institute

Twitter: @Catalogablog

-----Original Message-----
From: Code for Libraries [mailto:[log in to unmask]] On Behalf Of Shaun Ellis
Sent: Friday, August 30, 2013 10:24 AM
To: [log in to unmask]
Subject: Re: [CODE4LIB] Subject Terms in Institutional Repositories

Mike, what do you mean when you say "don't think in terms of LCSH"?  Is there some other vocabulary that they think in?  If LCSH is the best option, the right interface may help them "think in terms of LCSH".  For example, auto-completion/suggestion of headings when tagging or searching might be necessary.