Chris:

Dublin Core can be extended by organizations who have a need to do so 
but there is no expectation that those extensions become a part of 
Dublin Core itself or are understood by DC applications (or in this 
case, included in mappings or transforms).  The valid DC terms are 
available here: http://dublincore.org/documents/dcmi-terms/. 

You might want to take a look at the "Guidelines for Dublin Core 
Applicaton Profiles" recently published as a Working Draft on the DCMI 
website: http://dublincore.org/documents/2008/11/03/profile-guidelines/.

    "2008-11-03, The new DCMI Working Draft "Guidelines for Dublin Core
    Application Profiles" describes the key components of an application
    profile and walks the reader through the process of designing a
    profile. Addressed primarily to a non-technical audience, the
    guidelines also provide a technical appendix about modeling the
    metadata interoperably for use in linked data environments. This
    draft will be revised in response to feedback from readers.
    Interested members of the public are invited to post comments by 1
    December 2008 to the DC-GENERAL mailing list, including "[Public
    Comment]" in the subject line."

The document has some discussion about defining new metadata terms for 
use with Dublin Core.

Regards,
Diane Hillmann
Editor, "Using Dublin Core"


Chris Dietrich wrote:
> Someone please clarify for DC novices (like myself): It is my understanding
> that DC is qualified (customized) by each organization/enterprise to meet
> parochial business requirements, so it would not be possible to create a
> generalized Qualified DC to MODS transform(?).
>
> Cheers,
>
> C-
>
> Chris Dietrich, M.S.
> Digital Information Manager
> Resource Information Management Division (RIMD)
> NPS Office of the Chief Information Officer (OCIO)
> National Park Service Partner/Colorado State University
>
> Work: 303-987-6971
> Mobile: 970-218-9905
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>
>