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This is being sent to both the PREMIS Implementors' Group list and the
METS list. Sorry for the duplication.

In preparation for a PREMIS tutorial that Priscilla Caplan and I just did
in Glasgow (sponsored by Digital Curation Centre), I spent a lot of time
trying to figure out the best approach for using PREMIS with METS. Thanks
especially to Morgan Cundiff at LC and Tom Habing at UIUC for helping me
with this. I have made available a sample document to illustrate the
approach that we came up with and solicit comments about it. It is at:
http://www.loc.gov/standards/premis/louis.xml

Some notes on the approach.

1. There is one administrative metadata with multiple techMD and
digiProvMDs. The ADMID on <file> of course links to the appropriate techMD
or digiProvMD.

2. PREMIS object metadata is in techMD and premis:event is in digiProv. If
we had premis:rights it would be in rightsMD.

3. If there are elements in PREMIS that are also in METS, they are encoded
redundantly. We thought that there was no harm in this and perhaps safer.

4. If there is MIX, generally the data that is in PREMIS is in the PREMIS
section and only the additional elements that are file specific are
included in the MIX section. Note that this is based on the older version
of MIX; MIX is in the process of revision because of the Z39.87 revision
to harmonize the element names with PREMIS where they are the same.

5. If there is an agent, it is in a separate digiProvMD or rightsMD
section depending upon which metadata it's related to. In this case we
haven't included a rightsMD section. We do have 2 events in digiProv. Then
we have repeated digiProv with an agent and both events link to the same
agent and the one agent is associated with both events in the file
section.

6. This example adds to a METS object we already had in our digital
library. I am considering this METS object an intellectual entity (in
PREMIS terms); thus the link to the presentation of it in the PREMIS
linkingIntellectualEntity.
see: http://lcweb2.loc.gov/cocoon/test-ihas/loc.natlib.gottlieb.09601/default.html

7. We have not included PREMIS metadata for the service copies, because we
consider them throwaways.

I would welcome any comments on this approach. Also any discussion so that
we can all start thinking about best practices for PREMIS/METS/MIX
together.

Rebecca
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^^  Rebecca S. Guenther                                   ^^
^^  Senior Networking and Standards Specialist            ^^
^^  Network Development and MARC Standards Office         ^^
^^  1st and Independence Ave. SE                          ^^
^^  Library of Congress                                   ^^
^^  Washington, DC 20540-4402                             ^^
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