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Hi Barbara!

I would like to find an answer for some points. I write below your
remarks and questions.

Barbara Sierman wrote:
> Hello all,
> 
> During the last months we at the KB in Holland studied the Premis Data
> Dictionary. In our e-Depot we use metadata, but when we started with the
> e-Depot the Premis Data Dictionary did not exist. So a comparison was
> made between the Premis data elements and our e-Depot system (DIAS from
> IBM). Our DIAS system will be upgraded to the next version so it is a
> good opportunity to study the data model . Most of the Premis elements
> will be relevant for us too. However some questions were left and I
> would like your opinion on the following:
> 
> 1. Premis definition of Representation:  a set of files, including
> structural metadata, needed for a complete and reasonable rendition of
> an Intellectual Entity.
> DIAS principle is 1 object = 1 AIP. If an object has a relation with
> other objects the relevant information in the bibliographical metadata
> will create the Intellectual Entity. So Representation Information will,
> as far as we know now, always concern one object.

> 3. Representation: creatingApplication
> In my opinion this element belongs to the File section and not to the
> Representation section, as it is the Application that created the file,
> despite the representation of the file.

It is more or less a question how you define an object/a representation
and which kind of objects you use. A represenatation is a bunch of files
and structural metadata for a "complete and reasonable rendition of an
Intellectual Entity".

The given example of a FlashMX represenation might confuse, because
often it is available in one single flash file. But it might also
consist of several files and a central flash file with structural and
other information for the coordniation of the rendition.

You might want to record that this representation was composed and
compiled with one installation of FlashMX in version XYZ, because
failures and bugs do happen and maybe they occur only within one
installed version.

Another reason are format changes. You have to know about the context
and relations to reconstruct things. Even if you are able to render some
files independently of that central flash file, you might not be able to
reconstruct the impression of the dynamic of the presentation, might not
know about the completeness and the context of the used files. It is
essential to know how things are embedded and used and that they are
part of one representation. That gets even more important if you don not
know about the internal structure of (proprietary) formats.
This information might also be important for other complex objects, too.


> 6. One practical point: I numbered all the elements (1, 1.1, 1.1.1 etc),
> which make them easier to trace in the Dictionary.

I think a numbering scheme could be very helpfull for other users, too.
Can you send it out to the wiki as a basis for a discussion?

Ciao

Olaf

> I look forward to your reactions and will thank you very much in
> advance.
> 
> Kind regards,
> 
> 
> Barbara Sierman
> Digital Preservation Officer
>  
> Koninklijke Bibliotheek
> PO Box 90407
> 2509 LK Den Haag, The Netherlands
>  
> +31 70 3140109
> [log in to unmask]
> 
> www.kb.nl

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