hi Jerome, all,

I am afraid I do not agree. Making elements optional (or removing elements
from the PREMIS XML Schema) because this would solve the redundancy
between PREMIS and METS is a bad way forward. PREMIS will be used in
conjunction with many technologies (including METS, MPEG-21 DIDL, CCSDS
XFDU, etc.) and therefore should be defined independently of such
technologies. For example, PREMIS - as it currently stands - can be easily
integrated with MPEG-21 DIDL (see: a paper Herbert Van de Sompel and I
recently submitted to the PV2005 archive:

I also doubt that the aforementioned redundancy problem is intrinsic to
the combination of METS and PREMIS only. I notice a similar overlap
between the METS CHECKSUM & CHECKSUMTYPES attributes and elements from the
W3C XML Signature Standard; dito with regard to the METS BETYPE & EXTTYPE
attributes and elements from the ISO MPEG-7 MDS Standard. Are there any
plans to change those International Standards as well?

Let me end with a constructive note. Instead of changing the PREMIS Schema
based on practical issues resulting from its use with METS, one may
consider defining the PREMIS elements and attributes in a global manner
(instead of defining them locally as is the case in the current PREMIS XML
Schema). This would allow for the re-use of inidividual PREMIS elements
and attributes, including XML fragments, in other technological
environments (including METS) when needed.

best regards

> I wouldn't advocate removing PREMIS elements.  But making some elements
> optional in PREMIS so that people working within a METS context can
> decide
> whether they want to record information within METS or within PREMIS on
> their own is certainly an option.
> On Oct 18, 2005, at 8:35 AM, Steve Bordwell wrote:
>> Olaf,
>> I would agree that it is essential that there is only one PREMIS
>> metadata schema, and that multiple flavours to meet the needs of a
>> specific application or implementation defeats its purpose as a
>> standard.
>> It should not be assumed that all those who use PREMIS will do so in
>> conjunction with METS. For a number of reasons we will not
>> initially be
>> implementing METS. We still want to use PREMIS and are designing a
>> database using PREMIS. From the viewpoint of a non-METS user, PREMIS
>> therefore needs to remain a complete and coherent schema in itself.
>> Perhaps I have missed the point, but I am concerned that if there is
>> redundancy between PREMIS and METS, that PREMIS semantic elements will
>> be removed in favour of elements of METS.
>> Steve
>> -----Original Message-----
>> From: PREMIS Implementors Group Forum [mailto:[log in to unmask]] On
>> Behalf Of
>> Olaf Brandt
>> Sent: 13 October 2005 17:53
>> To: [log in to unmask]
>> Subject: [PIG] mandatory elements
>> Hi,
>> I would like to argue, that we should provide a standard, which is
>> clear
>> on the one hand but which is also easily usable. Usability in the
>> context of the real world means, that we consider that many
>> institutions
>> might use METS.
>> One main result of point 5.2., metadata usage, in the PREMIS
>> surveyreport (page 45,
>> )
>> is that
>> "METS was by far the most commonly used scheme. Survey results
>> indicate
>> adoption in all three types of institution, although to varying
>> degrees:
>> 64% of libraries, 42% of archives, and 35% of other institutions
>> used or
>> planned to use METS."
>> The PREMIS group recommended the usage of METS:
>> The following appear to be trends in practice that may ultimately
>> emerge
>> as best practices:
>> ...Use the METS format for structural metadata and as a container for
>> descriptive and administrative metadata; use Z39.87/MIX for technical
>> metadata for still images. (Trends and conclusions, page 7)
>> I my opinion, we should at least have a closer look, how the PREMIS
>> Metadata schemas could be integrated in METS without too many
>> redundancies.
>> One of my main concerns is the split up of the PREMIS schemas in too
>> many different flavours. That could mean a lack of common tools. If
>> there is a way to integrate the PRMEMIS schmeas easily in METS (but
>> being explicit enough!), I would be glad.
>> Cheers
>> Olaf
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> Jerome McDonough, Asst. Professor
> Graduate School of Library & Information Science
> University of Illinois, Urbana-Champaign
> 501 E. Daniel Street, Room 202
> Champaign, IL 61820
> (217) 244-5916
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